Subject: [Mgs] MGB Ignition Idle

From: Joel Martin via Mgs <[email-masked]>
Date: Tue, 8 Oct 2019 10:18:44 +0000 (UTC)

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 I am the original owner of a 1973 MGB with 227,000 miles on the odometer.

A couple of years ago with the last rebuild, I\we installed a Petronix's ig=
nition and had Mr. Johnson rebuild the HIF4 carbs replacing the throttle bo=
dy shafts. I had rebuilt the carbs a couple of times in the past but never =
had the throttle body shafts replaced. This was the best things I\we had do=
ne and wish I\we had done this 5 years ago. The car starts on the first tur=
n of the key and idles and runs great. Any starting or idle issues , I woul=
d highly recommend doing these 2 things. Cost about $400. What a difference=
! Of course always carry a new set of points, condenser and rotor in the bo=
ot in case any issue with Petronix. The look is stock above the distributor=
 cap with one extra wire and the way it starts, runs and idles, these 2 ite=
ms, in my opinion, are well worth the cost.

To determine if your throttle shafts are leaking, start car and at operatin=
g temp, spray some carb cleaner around shafts. Any change in idle RPM'S ind=
icate shafts are leaking air.

Regards

Joel Martin

     On Monday, October 7, 2019, 2:00:10 PM EDT, <[email-masked]=
t> wrote: =20
=20
 Send Mgs mailing list submissions to
=C2=A0=C2=A0=C2=A0 [email-masked]

To subscribe or unsubscribe via the World Wide Web, visit
=C2=A0=C2=A0=C2=A0 http://autox.team.net/mailman/listinfo/mgs
or, via email, send a message with subject or body 'help' to
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Archive: http://www.team.net/archive

Today's Topics:

=C2=A0 1. Re: Sunday morning, a bit OT (Rick)
=C2=A0 2. Re: Sunday morning, a bit OT (Craig Brownlee)
=C2=A0 3. Re: Sunday morning, a bit OT (PaulHunt73)
=C2=A0 4. Re: Sunday morning, a bit OT (Robert's New iPad)
=C2=A0 5. Re: Sunday morning, a bit OT (PaulHunt73)
=C2=A0 6. Re: Sunday morning, a bit OT (PaulHunt73)
> Best drive with Dave was in 2011 to the GT=E2=80=99s home grounds, United=
> Kingdom, where he pictured =C2=A0Paul Hunt and me with our MG=E2=80=99s i=
n front> of the Heritage Museum England.
=C2=A0 =C2=A0I'd love to meet you both face-to-face. I may join my friend R=
ui Gigante and attend the MGB-GT event. It would be great to be all togethe=
r. Think I could smuggle a moped into my carry-on luggage?
Rick=C2=A0Hi Rick,

I love what you do with your grandson.=20

My Sunday afternoon is being spent researching=C2=A0 the MGB ignition proce=
ss. My B hasn=E2=80=99t been driven much over the past few years because of=
 a problem that I=E2=80=99m assuming is probably points related. It was run=
ning great after my mechanic did a tune up and then it started sputtering a=
nd now can=E2=80=99t pull itself around the driveway.=C2=A0 At the last ser=
vice my mechanic convinced me to replace the Petronix electronic ignition f=
or points. I=E2=80=99m hoping that reinstalling=C2=A0 the electronic igniti=
on will cure my problem.=20

Watching YouTube videos to make sure I will know how to do it. Finally cool=
ing off here in Tulsa so it is perfect MG weather.=20

Craig

Craig Brownlee, PE LLC
918.728.5950
Sent from my iPhone

> On Oct 6, 2019, at 6:40 AM, Richard Lindsay via Mgs <[email-masked]> =
wrote:
>=20
> =EF=BB=BF
> Hello Friends, and good morning from South Texas!
>=20
> Another hot day is forecast for today so I plan to get my car work (play?=
) done early. Two jobs are in the queue, neither of which involves the Mase=
rati, strangely enough! :-P The first is filling two petrol jugs with fuel =
and heading to my shop. The Triumph TR6 ran out of gas while moving it abou=
t yesterday. My grandson and I ended up pushing it into position, ready for=
 tomorrow's transport.
>=20
> Once the TR6 is fueled, its back to the house to spend an hour or so on t=
he MG TD. That car is to get the other half of its tune up. Specifically, t=
he timing will be checked, and adjusted as required,=C2=A0 valves adjusted,=
 and the SU carburetors will get cleaned and the linkage lubricated. The ca=
r will get a new brake master cylinder, but not today. Rather, a garage cle=
anup is needed first so the master cylinder job can happen cleanly and effi=
ciently.
>=20
> As much as I have enjoyed working on the Biturbo, it's nice that I now do=
n't have to do so! It's running great. Yesterday, the car started at the fi=
rst turn of the key and ran great as I moved cars around. After completing =
a few more competing projects, the car will get regular use.
>=20
> You? How are you spending your Sunday? Any LBC projects in the queue. I k=
now some of you are contemplating winter storage and maintenance projects f=
or your cars, but for us on America's south coast, its driving season!
>=20
> Rick
>=20
> _______________________________________________
>=20
> [email-masked]
> Donate: http://www.team.net/donate.html
> Suggested annual donation=C2=A0 $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/craigbrownlee@cox.=
net

 Fortunately the UK still has 5% max ethanol=C2=A0in both standard and high=
 octanes.=C2=A0 There is 'moral' pressure from some quarters on the Governm=
ent to increase it to 10% max but suppliers can meet their legal requiremen=
ts purely with bio diesel, and=C2=A0don't want to be the first to go to 10%=
 and get bad publicity from complaints.=C2=A0 If the move against diesel ga=
thers pace that may force their hands.=C2=A0The main problem with fuel hose=
s and everything else rubber here is the quality of the rubber itself.=C2=
=A0 I've always (30 years) run the roadster on high octane but the V8 (24 y=
ears) always on standard which has=C2=A0had ethanol at 5% max for 20 years =
now.=C2=A0 While 98 octane may not have contained ethanol originally, suppl=
iers tended to be cagey when asked directly, and others indicated that it v=
aried according to where in the UK you bought it.=C2=A0 Four years ago I de=
cided to replace the V8 pump hoses as the braiding was crumbling when it ca=
me to me so they were probably original=C2=A0-=C2=A0but as far as the rubbe=
r goes the old ones were in perfect condition.=C2=A0 I even slit a piece le=
ngthwise and opened it out but there wasn't a trace of cracking.=C2=A0 When=
 I first got the V8 it didn't have any carb overflow hoses so I installed t=
hem, and they have had to be replaced since from severe cracking - and they=
 don't even carry liquid fuel, only vapour.=C2=A0 I fitted non-braided so I=
 can keep an eye on the external condition at least, but I have no doubt th=
ey won't last anywhere near as long as the originals.=C2=A0If standard here=
 goes up to 10% - fortunately pumps are now required to be labelled clearly=
 on the pump as well as the nozzle itself - I'll run the V8 on high octane =
as well, as that has been designated 'petrol protection grade' for older ve=
hicles for the foreseeable future.=C2=A0PaulH.
 ----- Original Message -----  Last week 95 octane fuel has to be 10% bio-e=
thanol, which makes even post-modern cars vulnerable for this nasty fuel ad=
ditive.  =20
  =20
So I=E2=80=99ll change the type of fuel for my mopeds to a special one. The=
 BGT will get the 98 octane fuel, which contains 5% bio-ethanol.

Hi Craig,
=C2=A0 Give the Pertronix a go, now that you have them/it.=C2=A0 It should =
work OK.
=C2=A0 Don=E2=80=99t be reticent about using points, though, as they can al=
ways be set well enough to limp home, whereas Pertronix works or not-no in =
between.
=C2=A0 Easily overlooked is the little, very little, black earth wire betwe=
en the moving plate of distributor and the distributor body.=C2=A0 If you a=
re experiencing intermittent electrics, check that for continuity, or bette=
r, replace the 40 year-old thing.=20
Bob

> On Oct 6, 2019, at 5:05 PM, Craig Brownlee via Mgs <[email-masked]> w=
rote:
>=20
> Hi Rick,
>=20
> I love what you do with your grandson.=20
>=20
> My Sunday afternoon is being spent researching=C2=A0 the MGB ignition pro=
cess. My B hasn=E2=80=99t been driven much over the past few years because =
of a problem that I=E2=80=99m assuming is probably points related. It was r=
unning great after my mechanic did a tune up and then it started sputtering=
 and now can=E2=80=99t pull itself around the driveway.=C2=A0 At the last s=
ervice my mechanic convinced me to replace the Petronix electronic ignition=
 for points. I=E2=80=99m hoping that reinstalling=C2=A0 the electronic igni=
tion will cure my problem.=20
>=20
> Watching YouTube videos to make sure I will know how to do it. Finally co=
oling off here in Tulsa so it is perfect MG weather.=20
>=20
> Craig
>=20
> Craig Brownlee, PE LLC
> 918.728.5950
> Sent from my iPhone
>=20
>> On Oct 6, 2019, at 6:40 AM, Richard Lindsay via Mgs <[email-masked]>=
 wrote:
>>=20
>> =EF=BB=BF
>> Hello Friends, and good morning from South Texas!
>>=20
>> Another hot day is forecast for today so I plan to get my car work (play=
?) done early. Two jobs are in the queue, neither of which involves the Mas=
erati, strangely enough! :-P The first is filling two petrol jugs with fuel=
 and heading to my shop. The Triumph TR6 ran out of gas while moving it abo=
ut yesterday. My grandson and I ended up pushing it into position, ready fo=
r tomorrow's transport.
>>=20
>> Once the TR6 is fueled, its back to the house to spend an hour or so on =
the MG TD. That car is to get the other half of its tune up. Specifically, =
the timing will be checked, and adjusted as required,=C2=A0 valves adjusted=
, and the SU carburetors will get cleaned and the linkage lubricated. The c=
ar will get a new brake master cylinder, but not today. Rather, a garage cl=
eanup is needed first so the master cylinder job can happen cleanly and eff=
iciently.
>>=20
>> As much as I have enjoyed working on the Biturbo, it's nice that I now d=
on't have to do so! It's running great. Yesterday, the car started at the f=
irst turn of the key and ran great as I moved cars around. After completing=
 a few more competing projects, the car will get regular use.
>>=20
>> You? How are you spending your Sunday? Any LBC projects in the queue. I =
know some of you are contemplating winter storage and maintenance projects =
for your cars, but for us on America's south coast, its driving season!
>>=20
>> Rick
>>=20
>> _______________________________________________
>>=20
>> [email-masked]
>> Donate: http://www.team.net/donate.html
>> Suggested annual donation=C2=A0 $12.75
>>=20
>> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>>=20
>> Unsubscribe: http://autox.team.net/mailman/options/mgs/craigbrownlee@cox=
.net
>=20
> _______________________________________________
>=20
> [email-masked]
> Donate: http://www.team.net/donate.html
> Suggested annual donation=C2=A0 $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/[email-masked]

If the points or other trigger are iffy you normally get the tach needle=20
jumping around with any misfire.=C2=A0 If the tach is steady it's more like=
ly to=20
be HT or fuel.=C2=A0 Could be the condenser with points - especially if rec=
ently=20
replaced, but they usually work or they don't.

The little wire Robert refers to - which originally was brown=20
cloth-insulated tinsel wire - is needed for under-cap triggers such as=20
Pertronix and points.=C2=A0 It's not used where only the pickup is under th=
e cap=20
and the electronics are external such as Optronic or Magnetronic.=C2=A0 Wit=
h=20
vacuum advance it is continually being flexed back and fore so can fracture=
=20
eventually.=C2=A0 The 25D4 points wire from the external spade is the same.=
=C2=A0 On=20
45D4 distributors where the points wire passes out though a hole in the=20
distributor body, that is black plastic insulated, is designed to be more=
=20
flexible than standard wire, but can still fracture internally.

PaulH.

----- Original Message -----=20
>=C2=A0 Easily overlooked is the little, very little, black earth wire betw=
een=20
> the moving plate of distributor and the distributor body.=C2=A0 If you ar=
e=20
> experiencing intermittent electrics, check that for continuity, or better=
,=20
> replace the 40 year-old thing.

 If=C2=A0local law insists they add ethanol to a certain proportion, which =
has the side-effect of increasing octane, why would they continue using som=
e other octane-boosting constituent?=C2=A0 In fact surely they would have n=
o choice but to reduce=C2=A0or eliminate=C2=A0it in order to maintain a giv=
en octane.=C2=A0 Unless they let the octane rise several points but market =
it as lower octane and sell it at that lower octane price ...=C2=A0PaulH.
 ----- Original Message -----  The skeptical and distrusting scientist in m=
e wants to believe that petrol manufacturers are using the ethanol content =
to elevate the effective octane rating thereby saving the other octane boos=
ting stuff, whatever it is.   =C2=A0
_______________________________________________
Mgs mailing list
[email-masked]
http://autox.team.net/mailman/listinfo/mgs
 =20
------=_Part_3353032_1657745247.1570529924193
Content-Transfer-Encoding: quoted-printable

<div>                I am the original owner of a 1973 MGB with 227,000 mil=
es on the odometer.<br><br>A couple of  years ago with the last rebuild, I\=
we installed a Petronix&#39;s ignition and had Mr. Johnson rebuild the HIF4=
 carbs replacing the throttle body shafts.  I had rebuilt the carbs a coupl=
e of times in the past but never had the throttle body shafts replaced. Thi=
s was the best things I\we had done and wish I\we had done this 5 years ago=
.  The car starts on the first turn of the key and idles and runs great.  A=
ny starting or idle issues , I would highly recommend doing these 2 things.=
  Cost about $400.  What a difference!  Of course always carry a new set of=
 points, condenser and rotor in the boot in case any issue with Petronix.  =
The look is stock above the distributor cap with one extra wire and the way=
 it starts, runs and idles, these 2 items, in my opinion, are well worth th=
e cost.<br><br>To determine if your throttle shafts are leaking, start car =
and at operating temp, spray some carb cleaner around shafts.  Any change i=
n idle RPM&#39;S indicate shafts are leaking air.<br><br>Regards<br><br>Joe=
l Martin<br><br>            </div>            <div class=3D"yahoo_quoted" s=
tyle=3D"margin:10px 0px 0px 0.8ex;border-left:1px solid #ccc;padding-left:1=
ex;">                        <div style=3D"font-family:'Helvetica Neue', He=
lvetica, Arial, sans-serif;font-size:13px;color:#26282a;">                 =
               <div>                    On Monday, October 7, 2019, 2:00:10=
 PM EDT,  &lt;[email-masked]&gt; wrote:                </div>  =
              <div><br></div>                <div><br></div>               =
 <div><div dir=3D"ltr">Send Mgs mailing list submissions to<br></div><div d=
ir=3D"ltr">&nbsp;&nbsp;&nbsp; <a ymailto=3D"mailto:[email-masked]" href=
=3D"mailto:[email-masked]">[email-masked]</a><br></div><div dir=3D"=
ltr"><br></div><div dir=3D"ltr">To subscribe or unsubscribe via the World W=
ide Web, visit<br></div><div dir=3D"ltr">&nbsp;&nbsp;&nbsp; <a href=3D"http=
://autox.team.net/mailman/listinfo/mgs" target=3D"_blank">http://autox.team=
.net/mailman/listinfo/mgs</a><br></div><div dir=3D"ltr">or, via email, send=
 a message with subject or body 'help' to<br></div><div dir=3D"ltr">&nbsp;&=
nbsp;&nbsp; <a ymailto=3D"mailto:[email-masked]" href=3D"mailto=
:[email-masked]">[email-masked]</a><br></div><div d=
ir=3D"ltr"><br></div><div dir=3D"ltr">You can reach the person managing the=
 list at<br></div><div dir=3D"ltr">&nbsp;&nbsp;&nbsp; <a ymailto=3D"mailto:=
[email-masked]" href=3D"mailto:[email-masked]">mgs-owne=
[email-masked]</a><br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">W=
hen replying, please edit your Subject line so it is more specific<br></div=
><div dir=3D"ltr">than "Re: Contents of Mgs digest..."<br></div>Donate: <a =
href=3D"http://www.team.net/donate.html" target=3D"_blank">http://www.team.=
net/donate.html</a><br>Suggested annual donation&nbsp; $12.75<br>Archive: <=
a href=3D"http://www.team.net/archive" target=3D"_blank">http://www.team.ne=
t/archive</a><br>Forums: <a href=3D"http://www.team.net/forums" target=3D"_=
blank">http://www.team.net/forums</a><br><br>Today's Topics:<br><br>&nbsp; =
 1. Re: Sunday morning, a bit OT (Rick)<br>&nbsp;  2. Re: Sunday morning, a=
 bit OT (Craig Brownlee)<br>&nbsp;  3. Re: Sunday morning, a bit OT (PaulHu=
nt73)<br>&nbsp;  4. Re: Sunday morning, a bit OT (Robert's New iPad)<br>&nb=
sp;  5. Re: Sunday morning, a bit OT (PaulHunt73)<br>&nbsp;  6. Re: Sunday =
morning, a bit OT (PaulHunt73)<br><div id=3D"ymsg72009" class=3D"ymsg197148=
7818" src=3D"mid://AC3j75MT0sk1XZt9Kg5AcMIs9lc/4.1"><div id=3D"yiv590439178=
1"><div>&gt; Best drive with Dave was in 2011 to the GT=E2=80=99s home grou=
nds, United<div>&gt; Kingdom, where he pictured &nbsp;Paul Hunt and me with=
 our MG=E2=80=99s in front</div><div>&gt; of the Heritage Museum England.</=
div><div><br></div><div>&nbsp; &nbsp;I'd love to meet you both face-to-face=
. I may join my friend Rui Gigante and attend the MGB-GT event. It would be=
 great to be all together. Think I could smuggle a moped into my carry-on l=
uggage?</div><div><br></div><div>Rick&nbsp;</div></div></div></div><div id=
=3D"ymsg29898" class=3D"ymsg1971487818" src=3D"mid://AC3j75MT0sk1XZt9Kg5AcM=
Is9lc/4.2">Hi Rick,<br><br>I love what you do with your grandson. <br><br>M=
y Sunday afternoon is being spent researching&nbsp; the MGB ignition proces=
s. My B hasn=E2=80=99t been driven much over the past few years because of =
a problem that I=E2=80=99m assuming is probably points related. It was runn=
ing great after my mechanic did a tune up and then it started sputtering an=
d now can=E2=80=99t pull itself around the driveway.&nbsp; At the last serv=
ice my mechanic convinced me to replace the Petronix electronic ignition fo=
r points. I=E2=80=99m hoping that reinstalling&nbsp; the electronic ignitio=
n will cure my problem. <br><br>Watching YouTube videos to make sure I will=
 know how to do it. Finally cooling off here in Tulsa so it is perfect MG w=
eather. <br><br>Craig<br><br>Craig Brownlee, PE LLC<br>918.728.5950<br>Sent=
 from my iPhone<br><br>&gt; On Oct 6, 2019, at 6:40 AM, Richard Lindsay via=
 Mgs &lt;<a ymailto=3D"mailto:[email-masked]" href=3D"mailto:mgs@autox.=
team.net">[email-masked]</a>&gt; wrote:<br>&gt; <br>&gt; =EF=BB=BF<br>&=
gt; Hello Friends, and good morning from South Texas!<br>&gt; <br>&gt; Anot=
her hot day is forecast for today so I plan to get my car work (play?) done=
 early. Two jobs are in the queue, neither of which involves the Maserati, =
strangely enough! :-P The first is filling two petrol jugs with fuel and he=
ading to my shop. The Triumph TR6 ran out of gas while moving it about yest=
erday. My grandson and I ended up pushing it into position, ready for tomor=
row's transport.<br>&gt; <br>&gt; Once the TR6 is fueled, its back to the h=
ouse to spend an hour or so on the MG TD. That car is to get the other half=
 of its tune up. Specifically, the timing will be checked, and adjusted as =
required,&nbsp; valves adjusted, and the SU carburetors will get cleaned an=
d the linkage lubricated. The car will get a new brake master cylinder, but=
 not today. Rather, a garage cleanup is needed first so the master cylinder=
 job can happen cleanly and efficiently.<br>&gt; <br>&gt; As much as I have=
 enjoyed working on the Biturbo, it's nice that I now don't have to do so! =
It's running great. Yesterday, the car started at the first turn of the key=
 and ran great as I moved cars around. After completing a few more competin=
g projects, the car will get regular use.<br>&gt; <br>&gt; You? How are you=
 spending your Sunday? Any LBC projects in the queue. I know some of you ar=
e contemplating winter storage and maintenance projects for your cars, but =
for us on America's south coast, its driving season!<br>&gt; <br>&gt; Rick<=
br>&gt; <br>&gt; _______________________________________________<br>&gt; <b=
r>&gt; <a ymailto=3D"mailto:[email-masked]" href=3D"mailto:[email-masked]=
am.net">[email-masked]</a><br>&gt; Donate: <a href=3D"http://www.team.n=
et/donate.html" target=3D"_blank">http://www.team.net/donate.html</a><br>&g=
t; Suggested annual donation&nbsp; $12.75<br>&gt; <br>&gt; Archive: <a href=
=3D"http://www.team.net/pipermail/mgs " target=3D"_blank">http://www.team.n=
et/pipermail/mgs </a><a href=3D"http://autox.team.net/archive" target=3D"_b=
lank">http://autox.team.net/archive</a><br>&gt; <br>&gt; Unsubscribe: <a hr=
ef=3D"http://autox.team.net/mailman/options/mgs/[email-masked]" targ=
et=3D"_blank">http://autox.team.net/mailman/options/mgs/[email-masked]=
et</a><br><br><br></div><div id=3D"ymsg52659" class=3D"ymsg1971487818" src=
=3D"mid://AC3j75MT0sk1XZt9Kg5AcMIs9lc/4.3"><div id=3D"yiv5904391781">  <sty=
le></style><div><div><font size=3D"2">Fortunately the UK still has 5% max e=
thanol&nbsp;in both standard and high octanes.&nbsp; There is 'moral' press=
ure from some quarters on the Government to increase it to 10% max but supp=
liers can meet their legal requirements purely with bio diesel, and&nbsp;do=
n't want to be the first to go to 10% and get bad publicity from complaints=
.&nbsp; If the move against diesel gathers pace that may force their hands.=
</font></div><div><font size=3D"2"></font>&nbsp;</div><div><font size=3D"2"=
>The main problem with fuel hoses and everything else rubber here is the qu=
ality of the rubber itself.&nbsp; </font><font size=3D"2">I've always (30 y=
ears) run the roadster on high octane but the V8 (24 years) always on stand=
ard which has&nbsp;had ethanol at 5% max for 20 years now.&nbsp; While 98 o=
ctane may not have contained ethanol originally, suppliers tended to be cag=
ey when asked directly, and others indicated that it varied according to wh=
ere in the UK you bought it.&nbsp; Four years ago I decided to replace the =
V8 pump hoses as the braiding was crumbling when it came to me so they were=
 probably original&nbsp;-&nbsp;but as far as the rubber goes the old ones w=
ere in perfect condition.&nbsp; I even slit a piece lengthwise and opened i=
t out but there wasn't a trace of cracking.&nbsp; When I first got the V8 i=
t didn't have any carb overflow hoses so I installed them, and they have ha=
d to be replaced since from severe cracking - and they don't even carry liq=
uid fuel, only vapour.&nbsp; I fitted non-braided so I can keep an eye on t=
he external condition at least, but I have no doubt they won't last anywher=
e near as long as the originals.</font></div><div><font size=3D"2"></font>&=
nbsp;</div><div><font size=3D"2">If standard here goes up to 10% - fortunat=
ely pumps are now required to be labelled clearly on the pump as well as th=
e nozzle itself - I'll run the V8 on high octane as well, as that has been =
designated 'petrol protection grade' for older vehicles for the foreseeable=
 future.</font></div><div><font size=3D"2"></font>&nbsp;</div><div><font si=
ze=3D"2">PaulH.</font></div><blockquote style=3D"BORDER-LEFT:#000000 2px so=
lid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px;"> =
 <div style=3D"FONT:10pt arial;">----- Original Message ----- </div>  <div =
style=3D"FONT:10pt arial;BACKGROUND:#e4e4e4;"><span style=3D"FONT-FAMILY:'c=
alibri' , 'sans-serif';COLOR:#1f497d;FONT-SIZE:11pt;">Last   week 95 octane=
 fuel has to be 10% bio-ethanol, which makes even post-modern   cars vulner=
able for this nasty fuel additive.</span></div>  <div class=3D"yiv590439178=
1gmail_extra">  <div class=3D"yiv5904391781gmail_quote">  <blockquote style=
=3D"BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex;" =
class=3D"yiv5904391781quote">    <div>    <div>    <p><span style=3D"FONT-F=
AMILY:'calibri' , 'sans-serif';COLOR:#1f497d;FONT-SIZE:11pt;">So     I=E2=
=80=99ll change the type of fuel for my mopeds to a special one. The BGT wi=
ll     get the 98 octane fuel, which contains 5%   bio-ethanol.</span></p><=
/div></div></blockquote></div></div></blockquote></div></div></div><div id=
=3D"ymsg04006" class=3D"ymsg1971487818" src=3D"mid://AC3j75MT0sk1XZt9Kg5AcM=
Is9lc/4.4">Hi Craig,<br>&nbsp; Give the Pertronix a go, now that you have t=
hem/it.&nbsp; It should work OK.<br>&nbsp; Don=E2=80=99t be reticent about =
using points, though, as they can always be set well enough to limp home, w=
hereas Pertronix works or not-no in between.<br>&nbsp;  Easily overlooked i=
s the little, very little, black earth wire between the moving plate of dis=
tributor and the distributor body.&nbsp; If you are experiencing intermitte=
nt electrics, check that for continuity, or better, replace the 40 year-old=
 thing. <br>Bob<br><br><br>&gt; On Oct 6, 2019, at 5:05 PM, Craig Brownlee =
via Mgs &lt;<a ymailto=3D"mailto:[email-masked]" href=3D"mailto:mgs@aut=
ox.team.net">[email-masked]</a>&gt; wrote:<br>&gt; <br>&gt; Hi Rick,<br=
>&gt; <br>&gt; I love what you do with your grandson. <br>&gt; <br>&gt; My =
Sunday afternoon is being spent researching&nbsp; the MGB ignition process.=
 My B hasn=E2=80=99t been driven much over the past few years because of a =
problem that I=E2=80=99m assuming is probably points related. It was runnin=
g great after my mechanic did a tune up and then it started sputtering and =
now can=E2=80=99t pull itself around the driveway.&nbsp; At the last servic=
e my mechanic convinced me to replace the Petronix electronic ignition for =
points. I=E2=80=99m hoping that reinstalling&nbsp; the electronic ignition =
will cure my problem. <br>&gt; <br>&gt; Watching YouTube videos to make sur=
e I will know how to do it. Finally cooling off here in Tulsa so it is perf=
ect MG weather. <br>&gt; <br>&gt; Craig<br>&gt; <br>&gt; Craig Brownlee, PE=
 LLC<br>&gt; 918.728.5950<br>&gt; Sent from my iPhone<br>&gt; <br>&gt;&gt; =
On Oct 6, 2019, at 6:40 AM, Richard Lindsay via Mgs &lt;<a ymailto=3D"mailt=
o:[email-masked]" href=3D"mailto:[email-masked]">[email-masked]=
</a>&gt; wrote:<br>&gt;&gt; <br>&gt;&gt; =EF=BB=BF<br>&gt;&gt; Hello Friend=
s, and good morning from South Texas!<br>&gt;&gt; <br>&gt;&gt; Another hot =
day is forecast for today so I plan to get my car work (play?) done early. =
Two jobs are in the queue, neither of which involves the Maserati, strangel=
y enough! :-P The first is filling two petrol jugs with fuel and heading to=
 my shop. The Triumph TR6 ran out of gas while moving it about yesterday. M=
y grandson and I ended up pushing it into position, ready for tomorrow's tr=
ansport.<br>&gt;&gt; <br>&gt;&gt; Once the TR6 is fueled, its back to the h=
ouse to spend an hour or so on the MG TD. That car is to get the other half=
 of its tune up. Specifically, the timing will be checked, and adjusted as =
required,&nbsp; valves adjusted, and the SU carburetors will get cleaned an=
d the linkage lubricated. The car will get a new brake master cylinder, but=
 not today. Rather, a garage cleanup is needed first so the master cylinder=
 job can happen cleanly and efficiently.<br>&gt;&gt; <br>&gt;&gt; As much a=
s I have enjoyed working on the Biturbo, it's nice that I now don't have to=
 do so! It's running great. Yesterday, the car started at the first turn of=
 the key and ran great as I moved cars around. After completing a few more =
competing projects, the car will get regular use.<br>&gt;&gt; <br>&gt;&gt; =
You? How are you spending your Sunday? Any LBC projects in the queue. I kno=
w some of you are contemplating winter storage and maintenance projects for=
 your cars, but for us on America's south coast, its driving season!<br>&gt=
;&gt; <br>&gt;&gt; Rick<br>&gt;&gt; <br>&gt;&gt; __________________________=
_____________________<br>&gt;&gt; <br>&gt;&gt; <a ymailto=3D"mailto:Mgs@aut=
ox.team.net" href=3D"mailto:[email-masked]">[email-masked]</a><br>&=
gt;&gt; Donate: <a href=3D"http://www.team.net/donate.html" target=3D"_blan=
k">http://www.team.net/donate.html</a><br>&gt;&gt; Suggested annual donatio=
n&nbsp; $12.75<br>&gt;&gt; <br>&gt;&gt; Archive: <a href=3D"http://www.team=
.net/pipermail/mgs " target=3D"_blank">http://www.team.net/pipermail/mgs </=
a><a href=3D"http://autox.team.net/archive" target=3D"_blank">http://autox.=
team.net/archive</a><br>&gt;&gt; <br>&gt;&gt; Unsubscribe: <a href=3D"http:=
//autox.team.net/mailman/options/mgs/[email-masked]" target=3D"_blan=
k">http://autox.team.net/mailman/options/mgs/[email-masked]</a><br>&=
gt; <br>&gt; _______________________________________________<br>&gt; <br>&g=
t; <a ymailto=3D"mailto:[email-masked]" href=3D"mailto:[email-masked]=
et">[email-masked]</a><br>&gt; Donate: <a href=3D"http://www.team.net/d=
onate.html" target=3D"_blank">http://www.team.net/donate.html</a><br>&gt; S=
uggested annual donation&nbsp; $12.75<br>&gt; <br>&gt; Archive: <a href=3D"=
http://www.team.net/pipermail/mgs " target=3D"_blank">http://www.team.net/p=
ipermail/mgs </a><a href=3D"http://autox.team.net/archive" target=3D"_blank=
">http://autox.team.net/archive</a><br>&gt; <br>&gt; Unsubscribe: <a href=
=3D"http://autox.team.net/mailman/options/mgs/[email-masked]" target=3D"_=
blank">http://autox.team.net/mailman/options/mgs/[email-masked]</a><br><b=
r></div><div id=3D"ymsg04866" class=3D"ymsg1971487818" src=3D"mid://AC3j75M=
T0sk1XZt9Kg5AcMIs9lc/4.5">If the points or other trigger are iffy you norma=
lly get the tach needle <br>jumping around with any misfire.&nbsp; If the t=
ach is steady it's more likely to <br>be HT or fuel.&nbsp; Could be the con=
denser with points - especially if recently <br>replaced, but they usually =
work or they don't.<br><br>The little wire Robert refers to - which origina=
lly was brown <br>cloth-insulated tinsel wire - is needed for under-cap tri=
ggers such as <br>Pertronix and points.&nbsp; It's not used where only the =
pickup is under the cap <br>and the electronics are external such as Optron=
ic or Magnetronic.&nbsp; With <br>vacuum advance it is continually being fl=
exed back and fore so can fracture <br>eventually.&nbsp; The 25D4 points wi=
re from the external spade is the same.&nbsp; On <br>45D4 distributors wher=
e the points wire passes out though a hole in the <br>distributor body, tha=
t is black plastic insulated, is designed to be more <br>flexible than stan=
dard wire, but can still fracture internally.<br><br>PaulH.<br><br>----- Or=
iginal Message ----- <br>&gt;&nbsp;  Easily overlooked is the little, very =
little, black earth wire between <br>&gt; the moving plate of distributor a=
nd the distributor body.&nbsp; If you are <br>&gt; experiencing intermitten=
t electrics, check that for continuity, or better, <br>&gt; replace the 40 =
year-old thing.<br><br><br><br></div><div id=3D"ymsg22300" class=3D"ymsg197=
1487818" src=3D"mid://AC3j75MT0sk1XZt9Kg5AcMIs9lc/4.6"><div id=3D"yiv590439=
1781">  <style></style><div><div><font size=3D"2">If&nbsp;local law insists=
 they add ethanol to a certain proportion, which has the side-effect of inc=
reasing octane, why would they continue using some other octane-boosting co=
nstituent?&nbsp; In fact surely they would have no choice but to reduce&nbs=
p;or eliminate&nbsp;it in order to maintain a given octane.&nbsp; Unless th=
ey let the octane rise several points but market it as lower octane and sel=
l it at that lower octane price ...</font></div><div><font size=3D"2"></fon=
t>&nbsp;</div><div><font size=3D"2">PaulH.</font></div><blockquote style=3D=
"BORDER-LEFT:#000000 2px solid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LE=
FT:5px;MARGIN-RIGHT:0px;" dir=3D"ltr">  <div style=3D"FONT:10pt arial;">---=
-- Original Message ----- </div>  <div style=3D"FONT:10pt arial;BACKGROUND:=
#e4e4e4;">The   skeptical and distrusting scientist in me wants to believe =
that petrol   manufacturers are using the ethanol content to elevate the ef=
fective octane   rating thereby saving the other octane boosting stuff, wha=
tever it is.</div>  <div>  <div>  <div><font size=3D"2"></font>&nbsp;</div>=
</div></div></blockquote></div></div></div>________________________________=
_______________<br>Mgs mailing list<br><a ymailto=3D"mailto:[email-masked].=
net" href=3D"mailto:[email-masked]">[email-masked]</a><br><a href=
=3D"http://autox.team.net/mailman/listinfo/mgs" target=3D"_blank">http://au=
tox.team.net/mailman/listinfo/mgs</a><br></div>            </div>          =
      </div>
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---

From: Richard Lindsay via Mgs <[email-masked]>
Date: Tue, 8 Oct 2019 06:37:57 -0500

--===============5641779188488768759==

--00000000000040d5bf0594649ab2

   Good advice Joel, and congratulations on your long ownership! Here are a
few more hopefully helpful ideas now surrounding your words. You wrote,

> I\we installed a Petronix's ignition...

   I did the same on both my TD and TR3b, and plan to do so on my TR6. The
issue with all of these cars was unstable slow idle timing. No electronic
trigger system alone would solve that problem.
   My original assumption was wear and therefore slop in the distributor
bushings, but that was not the case. The bushings were fine. The bits that
were worn out were the pivot holes and posts in the centrifugal advance
mechanisms. I observed the same problems in all three cars. There was
nothing for it but to replace the distributors. Okay, perhaps some of the
worn out bits could have been replaced if parts could have been sourced,
but since the holes AND posts were worn, I bought new.
   Like Joel I opted for Pertronix brand but purchased the whole
distributors. What an incredible improvement! I know owners often change to
electronic ignition trigger modules for reliability but I changed the
complete distributors for ignition timing stability. After upgrading, my
TR3b would idle smoothly at 500 rpm! (But I set it as per the manual.) The
TD would actually idle below 1500 rpm, which it wouldn't do before. :-P
   As I implied above, my next upgrade will be for the TR6, but that has to
wait until after paint. The coin chest is running way too low. Joel also
wrote,

>...and had Mr. Johnson rebuild the HIF4 carbs replacing the throttle
> body shafts.

   Yet another wise choice. Joel went on to say...

> To determine if your throttle shafts are leaking, start car and at
> operating temp, spray some carb cleaner around shafts.
> Any change in idle RPM'S indicate shafts are leaking air.

...and that is a good test. Now allow me to offer yet another tip.
   Should one determine that air is being sucked in between the shafts and
the bodies, here is a temporary BandAid fix while the owner saves up for a
proper repair. Saturate snug fitting felt washers with vacuum grease and
place them on the throttle shafts adjacent to the carb bodies. Use the
linkage to hold them snugly against the bodies, or add a washer or two, as
required.
   Vacuum grease is the stuff used in chemistry labs to seal glassware
fittings. It is designed specifically to not migrate into the experiment,
even under moderate heat. The same characteristic will keep it in place
while sealing air from leaking into the gap between the worn throttle
shafts and bores. Yes, it's a BandAid fix, not a proper repair, but it does
do two valid things: It validates the problem identification, and it buys
the owner time to save up for a proper repair.

   Thank you again Joel for reminding me to check my TR6's timing stability
and throttle shafts for vacuum leaks!

Rick

--00000000000040d5bf0594649ab2
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto"><div>=C2=A0 =C2=A0Good advice Joel, and congratulations o=
n your long ownership! Here are a few more hopefully helpful ideas now surr=
ounding your words. You wrote,</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">&gt;=C2=A0<span style=3D"font-family:sans-serif">I\we installed a Pe=
tronix&#39;s ignition...</span></div><div dir=3D"auto"><span style=3D"font-=
family:sans-serif"><br></span></div><div dir=3D"auto"><span style=3D"font-f=
amily:sans-serif">=C2=A0 =C2=A0I did the same on both my TD and TR3b, and p=
lan to do so on my TR6. The issue with all of these cars was unstable slow =
idle timing. No electronic trigger system alone would solve that problem.</=
span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif">=C2=A0 =
=C2=A0My original assumption was wear and therefore slop in the distributor=
 bushings, but that was not the case. The bushings were fine. The bits that=
 were worn out were the pivot holes and posts in the centrifugal advance me=
chanisms. I observed the same problems in all three cars. There was nothing=
 for it but to replace the distributors. Okay, perhaps some of the worn out=
 bits could have been replaced if parts could have been sourced, but since =
the holes AND posts were worn, I bought new.</span></div><div dir=3D"auto">=
<span style=3D"font-family:sans-serif">=C2=A0 =C2=A0Like Joel I opted for P=
ertronix brand but purchased the whole distributors. What an incredible imp=
rovement! I know owners often change to electronic ignition trigger modules=
 for reliability but I changed the complete distributors for ignition timin=
g stability. After upgrading, my TR3b would idle smoothly at 500 rpm! (But =
I set it as per the manual.) The TD would actually idle below 1500 rpm, whi=
ch it wouldn&#39;t do before. :-P</span></div><div dir=3D"auto"><span style=
=3D"font-family:sans-serif">=C2=A0 =C2=A0As I implied above, my next upgrad=
e will be for the TR6, but that has to wait until after paint. The coin che=
st is running way too low. Joel also wrote,</span></div><div dir=3D"auto"><=
br></div><div dir=3D"auto">&gt;...<span style=3D"font-family:sans-serif">an=
d had Mr. Johnson rebuild the HIF4 carbs replacing the throttle</span></div=
><div dir=3D"auto"><span style=3D"font-family:sans-serif">&gt; body shafts.=
</span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif"><br><=
/span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif">=C2=A0=
 =C2=A0Yet another wise choice. Joel went on to say...</span></div><div dir=
=3D"auto"><font face=3D"sans-serif"><br></font></div><div dir=3D"auto"><spa=
n style=3D"font-family:sans-serif">&gt; To determine if your throttle shaft=
s are leaking, start car and at</span></div><div dir=3D"auto"><span style=
=3D"font-family:sans-serif">&gt; operating temp, spray some carb cleaner ar=
ound shafts.</span></div><div dir=3D"auto"><span style=3D"font-family:sans-=
serif">&gt; Any change in idle RPM&#39;S indicate shafts are leaking air.</=
span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif"><br></s=
pan></div><div dir=3D"auto"><span style=3D"font-family:sans-serif">...and t=
hat is a good test. Now allow me to offer yet another tip.</span></div><div=
 dir=3D"auto"><span style=3D"font-family:sans-serif">=C2=A0 =C2=A0Should on=
e determine that air is being sucked in between the shafts and the bodies, =
here is a temporary BandAid fix while the owner saves up for a proper repai=
r. Saturate snug fitting felt washers with vacuum grease and place them on =
the throttle shafts adjacent to the carb bodies. Use the linkage to hold th=
em snugly against the bodies, or add a washer or two, as required.</span></=
div><div dir=3D"auto"><span style=3D"font-family:sans-serif">=C2=A0 =C2=A0V=
acuum grease is the stuff used in chemistry labs to seal glassware fittings=
. It is designed specifically to not migrate into the experiment, even unde=
r moderate heat. The same characteristic will keep it in place while sealin=
g air from leaking into the gap between the worn throttle shafts and bores.=
 Yes, it&#39;s a BandAid fix, not a proper repair, but it does do two valid=
 things: It validates the problem identification, and it buys the owner tim=
e to save up for a proper repair.</span></div><div dir=3D"auto"><span style=
=3D"font-family:sans-serif"><br></span></div><div dir=3D"auto"><span style=
=3D"font-family:sans-serif">=C2=A0 =C2=A0Thank you again Joel for reminding=
 me to check my TR6&#39;s timing stability and throttle shafts for vacuum l=
eaks!</span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif">=
<br></span></div><div dir=3D"auto"><span style=3D"font-family:sans-serif">R=
ick</span></div></div>

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[email-masked]

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