--===============5307203009513187994==
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Check for air leak at the intake manifold gaskets/blocks.=C2=A0 With car ru=
nning carefully spray carb cleaner around gasket areas.=C2=A0 If car revs g=
o up then you have a leak.=C2=A0 Watch out you don't spray on the exhaust.
From: wattaj via Datsun-roadsters <datsun-roadsters@autox.team.net>
To: "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>=20
Sent: Saturday, May 2, 2015 1:55 PM
Subject: Re: [Roadsters] High Speed Hesitation / Potential Fix?
=20
Update: =C2=A0Reassembled and plugged the lifter piston hole, and no improv=
ement.
Things I have done: =20
- Verified the timing and vacuum advance are set and working correctly. =
=20
- Adjusted the valves to correct clearance. =20
- Changed the dashpot oil to ATF. =20
- Disassembled the Domes, Pistons, Needles and cleaned. =20
- Reset the needles to correct depth according the Z-Therapy video metho=
d. =20
- Checked to make sure SU pistons are moving at the same pace within the=
domes. =20
- Checked for a kinked fuel lines from the float chambers to the nozzles=
. =20
- Set/Tuned the carbs according the write-up by Keith Williams.
The only thing that seems to get the car running smoothly and able to accel=
erate once at speed is to pull the choke out or set the mixture to very ric=
h.
I would maybe suspect the distributor is worn out, but if that were the cas=
e I wouldn't think pulling the choke out would make any difference.
Thanks,Alan
=20
From: wattaj via Datsun-roadsters <datsun-roadsters@autox.team.net>
To: "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>=20
Sent: Saturday, May 2, 2015 10:49 AM
Subject: [Roadsters] High Speed Hesitation / Potential Fix?
=20
I have been chasing this issue for a while and I am hoping I may have found=
something but would like your feedback. =C2=A0(Thanks in advance!)
When cruising around 3000 to 3200 RPM, if I press on the accelerator, the m=
otor wants to hesitate or cough, it will eventually get beyond this, but is=
annoying. =C2=A0I have done my best to tune things and the only thing that=
helps is making the front carb run very rich.
Today, when dissembling the carbs, I noticed the front carb was missing the=
Lifter Piston (part #=C2=A016324-10400)=C2=A0that you can use to test the =
lean/rich mixture from the bottom of the carb without having to put your fi=
nger into the throat of the carb. =C2=A0
Could that be creating a vacuum leak and cause of my issue?
Thanks,Alan
67-1600 (with a 67.5 engine)Portland, OR
=20
________________________________________
datsun-roadsters@autox.team.net
Archive: http://www.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/wattaj@=
yahoo.com
=20
________________________________________
datsun-roadsters@autox.team.net
Archive: http://www.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/datsun-roadsters/hrhasle=
tt@yahoo.com
------=_Part_1686104_1611135412.1430769464720
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:16px"><div>Check for air leak at the intake manifold gaskets/blocks=
. With car running carefully spray carb cleaner around gasket areas.&=
nbsp; If car revs go up then you have a leak. Watch out you don't spr=
ay on the exhaust.<br></div><div><span></span></div><br> <div id=3D"yui_3_=
16_0_1_1430768776899_4605" style=3D"font-family: HelveticaNeue, Helvetica N=
eue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div i=
d=3D"yui_3_16_0_1_1430768776899_4604" style=3D"font-family: HelveticaNeue, =
Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16p=
x;"> <div dir=3D"ltr"> <hr size=3D"1"> <font face=3D"Arial" size=3D"2"> <b=
><span style=3D"font-weight:bold;">From:</span></b> wattaj via Datsun-roads=
ters <datsun-roadsters@autox.team.net><br> <b><span style=3D"font-wei=
ght: bold;">To:</span></b> "datsun-roadsters@autox.team.net" <datsun-roa=
dsters@autox.team.net> <br> <b><span style=3D"font-weight: bold;">Sent:<=
/span></b> Saturday, May 2, 2015 1:55 PM<br> <b><span style=3D"font-weight:=
bold;">Subject:</span></b> Re: [Roadsters] High Speed Hesitation / Potenti=
al Fix?<br> </font> </div> <div id=3D"yui_3_16_0_1_1430768776899_4603" clas=
s=3D"y_msg_container"><br><div id=3D"yiv8462396415"><div id=3D"yui_3_16_0_1=
_1430768776899_4602"><div id=3D"yui_3_16_0_1_1430768776899_4601" style=3D"c=
olor:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, =
Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div id=3D"yiv=
8462396415yui_3_16_0_1_1430599258577_3492">Update: Reassembled and pl=
ugged the lifter piston hole, and no improvement.</div><div id=3D"yiv846239=
6415yui_3_16_0_1_1430599258577_3492"><br clear=3D"none"></div><div id=3D"yi=
v8462396415yui_3_16_0_1_1430599258577_3492">Things I have done:</div><ol di=
r=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430599258577_4440"><li id=3D"yiv=
8462396415yui_3_16_0_1_1430599258577_4446">Verified the timing and vacuum a=
dvance are set and working correctly.<br clear=3D"none"></li><li id=3D"yiv8=
462396415yui_3_16_0_1_1430599258577_4445">Adjusted the valves to correct cl=
earance.<br clear=3D"none"></li><li id=3D"yiv8462396415yui_3_16_0_1_1430599=
258577_4444">Changed the dashpot oil to ATF.<br clear=3D"none"></li><li id=
=3D"yiv8462396415yui_3_16_0_1_1430599258577_4443">Disassembled the Domes, P=
istons, Needles and cleaned.<br clear=3D"none"></li><li id=3D"yiv8462396415=
yui_3_16_0_1_1430599258577_4442">Reset the needles to correct depth accordi=
ng the Z-Therapy video method.<br clear=3D"none"></li><li id=3D"yiv84623964=
15yui_3_16_0_1_1430599258577_4441">Checked to make sure SU pistons are movi=
ng at the same pace within the domes.<br clear=3D"none"></li><li id=3D"yiv8=
462396415yui_3_16_0_1_1430599258577_4439">Checked for a kinked fuel lines f=
rom the float chambers to the nozzles.<br clear=3D"none"></li><li id=3D"yiv=
8462396415yui_3_16_0_1_1430599258577_4439">Set/Tuned the carbs according th=
e write-up by Keith Williams.</li></ol><div dir=3D"ltr" id=3D"yiv8462396415=
yui_3_16_0_1_1430599258577_3492"><br clear=3D"none"></div><div dir=3D"ltr" =
id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3492">The only thing that see=
ms to get the car running smoothly and able to accelerate once at speed is =
to pull the choke out or set the mixture to very rich.</div><div dir=3D"ltr=
" id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3492"><br clear=3D"none"></=
div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3492">I =
would maybe suspect the distributor is worn out, but if that were the case =
I wouldn't think pulling the choke out would make any difference.</div><div=
dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3492"><br clear=
=3D"none"></div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430599258=
577_3492">Thanks,</div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_143=
0599258577_3492">Alan</div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1=
_1430599258577_3492"><br clear=3D"none"></div><div dir=3D"ltr" id=3D"yiv846=
2396415yui_3_16_0_1_1430599258577_3492"><br clear=3D"none"></div><div id=3D=
"yiv8462396415yui_3_16_0_1_1430599258577_3492"><br clear=3D"none"></div> <=
div id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3821" style=3D"font-famil=
y:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-seri=
f;font-size:16px;"> <div id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3820=
" style=3D"font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Luc=
ida Grande, sans-serif;font-size:16px;"> <div class=3D"qtdSeparateBR"><br><=
br></div><div class=3D"yiv8462396415yqt0615385658" id=3D"yiv8462396415yqt83=
570"><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3819"> =
<hr id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3867" size=3D"1"> <font =
id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3866" face=3D"Arial" size=3D"=
2"> <b><span style=3D"font-weight:bold;">From:</span></b> wattaj via Datsun=
-roadsters <datsun-roadsters@autox.team.net><br clear=3D"none"> <b><s=
pan style=3D"font-weight:bold;">To:</span></b> "datsun-roadsters@autox.team=
.net" <datsun-roadsters@autox.team.net> <br clear=3D"none"> <b><span =
style=3D"font-weight:bold;">Sent:</span></b> Saturday, May 2, 2015 10:49 AM=
<br clear=3D"none"> <b><span style=3D"font-weight:bold;">Subject:</span></b=
> [Roadsters] High Speed Hesitation / Potential Fix?<br clear=3D"none"> </f=
ont> </div> <div class=3D"yiv8462396415y_msg_container" id=3D"yiv8462396415=
yui_3_16_0_1_1430599258577_3824"><br clear=3D"none"><div id=3D"yiv846239641=
5"><div id=3D"yiv8462396415yui_3_16_0_1_1430599258577_3828"><div id=3D"yiv8=
462396415yui_3_16_0_1_1430599258577_3827" style=3D"color:#000;background-co=
lor:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucid=
a Grande, sans-serif;font-size:16px;"><div dir=3D"ltr" id=3D"yiv8462396415y=
ui_3_16_0_1_1430588092886_4465"><span id=3D"yiv8462396415yui_3_16_0_1_14305=
88092886_4642">I have been chasing this issue for a while and I am hoping I=
may have found something but would like your feedback. (Thanks in ad=
vance!)</span></div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_143058=
8092886_4465"><span><br clear=3D"none"></span></div><div dir=3D"ltr" id=3D"=
yiv8462396415yui_3_16_0_1_1430588092886_4465"><span id=3D"yiv8462396415yui_=
3_16_0_1_1430588092886_4643">When cruising around 3000 to 3200 RPM, if I pr=
ess on the accelerator, the motor wants to hesitate or cough, it will event=
ually get beyond this, but is annoying. I have done my best to tune t=
hings and the only thing that helps is making the front carb run very rich.=
</span></div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430588092886=
_4465"><span><br clear=3D"none"></span></div><div dir=3D"ltr" id=3D"yiv8462=
396415yui_3_16_0_1_1430588092886_4465"><span class=3D"yiv8462396415" id=3D"=
yiv8462396415yui_3_16_0_1_1430588092886_4699" style=3D"">Today, when dissem=
bling the carbs, I noticed the front carb was missing the Lifter Piston (pa=
rt #<font id=3D"yiv8462396415yui_3_16_0_1_1430588092886_4955" size=3D"3">&n=
bsp;</font></span><font id=3D"yiv8462396415yui_3_16_0_1_1430588092886_4954"=
size=3D"3"><span class=3D"yiv8462396415" id=3D"yiv8462396415yui_3_16_0_1_1=
430588092886_4857" style=3D"font-family:Arial, Helvetica;">16324-10400)</sp=
an> </font>that you can use to test the lean/rich mixture from the bot=
tom of the carb without having to put your finger into the throat of the ca=
rb. </div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430588092=
886_4465"><span><br clear=3D"none"></span></div><div dir=3D"ltr" id=3D"yiv8=
462396415yui_3_16_0_1_1430588092886_4465"><span id=3D"yiv8462396415yui_3_16=
_0_1_1430588092886_4806">Could that be creating a vacuum leak and cause of =
my issue?</span></div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430=
588092886_4465"><span><br clear=3D"none"></span></div><div dir=3D"ltr" id=
=3D"yiv8462396415yui_3_16_0_1_1430588092886_4465"><span id=3D"yiv8462396415=
yui_3_16_0_1_1430599258577_4359">Thanks,</span></div><div dir=3D"ltr" id=3D=
"yiv8462396415yui_3_16_0_1_1430588092886_4465"><span id=3D"yiv8462396415yui=
_3_16_0_1_1430588092886_5026">Alan</span></div><div dir=3D"ltr" id=3D"yiv84=
62396415yui_3_16_0_1_1430588092886_4465"><span><br clear=3D"none"></span></=
div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430588092886_4465"><s=
pan id=3D"yiv8462396415yui_3_16_0_1_1430588092886_5014">67-1600 (with a 67.=
5 engine)</span></div><div dir=3D"ltr" id=3D"yiv8462396415yui_3_16_0_1_1430=
588092886_4465"><span id=3D"yiv8462396415yui_3_16_0_1_1430588092886_5045">P=
ortland, OR</span></div><div class=3D"yiv8462396415qtdSeparateBR"><br clear=
=3D"none"><br clear=3D"none"></div><div class=3D"yiv8462396415yqt3367531350=
" id=3D"yiv8462396415yqtfd47683"><div id=3D"yiv8462396415yui_3_16_0_1_14305=
88092886_4568" style=3D"font-family:HelveticaNeue, Helvetica Neue, Helvetic=
a, Arial, Lucida Grande, sans-serif;font-size:16px;"><div id=3D"yiv84623964=
15yui_3_16_0_1_1430588092886_4567" style=3D"font-family:HelveticaNeue, Helv=
etica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><d=
iv class=3D"yiv8462396415y_msg_container" id=3D"yiv8462396415yui_3_16_0_1_1=
430588092886_4574"><br clear=3D"none"></div> </div> </div> </div></div></d=
iv></div><br clear=3D"none"><div class=3D"yiv8462396415yqt3367531350" id=3D=
"yiv8462396415yqtfd78272">________________________________________<br clear=
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mailto:datsun-roadsters@autox.team.net"; target=3D"_blank" href=3D"mailto:da=
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Archive: http://www.team.net/archive
Unsubscribe:
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