Mayf--Thank you for many tips to my problem. Thank you so much!!! Russ
--------------------------------------------
On Thu, 10/4/18, <tigers-request@autox.team.net> wrote:
Subject: Tigers Digest, Vol 10, Issue 239
To: tigers@autox.team.net
Date: Thursday, October 4, 2018, 11:00 AM
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Today's Topics:
 1. Re: wierd in my experience
(Larry Mayfield)
----------------------------------------------------------------------
Message: 1
Date: Wed, 3 Oct 2018 11:33:47 -0700
From: "Larry Mayfield" <drmayf@mayfco.com>
To: "'Russ and Tammy C.'" <rtscolgan@yahoo.com>,
"Tiger List"
   <tigers@autox.team.net>
Subject: Re: [Tigers] wierd in my
experience
Message-ID:
<005f01d45b47$a1aa3880$e4fea980$@mayfco.com>
Content-Type:
text/plain;Â Â Â charset="us-ascii"
Well, let's think about it...
What causes engine backfire?
When the exhaust valve opens, the
mixture isn't done burning so it ignites
the unburned fuel in the exhaust system
and causes a loud bang. ... As with
backfiring, coughing or spitting can
also be caused by a bad ignition
system, such as cross firing, which
sends a spark to a cylinder that has the
intake valve open.
If the engine misses during a switch
operation, while running, then perhaps
the coil is not getting enough current
to charge the coil momentarily. That
give a moments time to flow a little
unburned fuel air into the exhaust
system and then ignite when spark is
restored. The white blue wire, running
back to the solenoid to provide full
voltage to the coil during starting is
not in play. But the wire that comes
from the tach to switch position 2 is
as that is what provide coil charging
power when running normally. What
could drop the voltage enough to fail
to charge the coil to sufficient
voltage to fire? The ignition switch is
in the run position so that comes
directly from the B post on the voltage
regulator, The B post has the
generator to battery charging wire, the
main lighting switch and panel light
switch via a connection to theÂ
main light switch. Looks to me like the
best trouble shooting would be to
remove the red wire or power that runs
between the main light switch to the
panel light switch. Start the engine
and let it come to temp and then switch
on the panel light. If it does not
backfire as it did then the source is
somewhere in that panel light system.
The before shutting the engine off try
the mail light switch. If it
backfires then, the problem is in the
main light circuit somewhere. Next
step, while running is to remove the
dimmer switch blue wire. That will take
the dimmer switch and head lights out
of the equation. If it still runs when
the lights are turned back on then that
means the problem is from the dimmer
switch to the head lights
somewhere. Put the blue wire back on and try the
main light switch again. If it fails
then the part of the wiring at fault is
from the dimmer outward, maybe the
dimmer has a short internal of a lamp
connection that fails momentarily after
powered then opens again.
Once the area has been isolated then
get after the search for failed parts
or connections.
Hope this helps!
Mayf
_________________________
drmayf
Worlds Fastest Sunbeam, period.
204.913 mph flying mile average speed
210.779 mph exit (not top)Â speed
-----Original Message-----
From: Tigers [mailto:tigers-bounces@autox.team.net]
On Behalf Of Russ and
Tammy C. via Tigers
Sent: Tuesday, October 2, 2018 1:07 PM
To: tigers@autox.team.net
Subject: [Tigers] wierd in my
experience
Group----Electrical problem for
sure????? My tiger backfires when I flip
any switch on the dash. I think
it might be the ignition switch shorting.
It also dies when idling. Anyone have
this problem before? Cause? You all
have been a great help in the recent
past for me and I am looking forward
to someone being of help now.Â
Thank you. Russ
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