Steve
Some blockage in your fuel supply is still possible.
Here are some other thoughts.
Are you running a generator or alternator and does it have enough
amperage to cover all the extras? Low voltage due to high amperage draw
could be reducing the coil output.
Bad spark plugs, too large of a spark plug gap or bad spark plug
wires?
This one is way out there but I have experienced applications where
a fuse has heated up and lost continuity momentarily.
Ron Fraser
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Steve Sage
Sent: Tuesday, May 13, 2003 2:01 AM
To: Tiger Mailing List
Subject: Electrical Question
I had again thought I'd solved my occassional "bump" while driving down
the road, and the stalling from idle, by replacing some suspect wiring
connections. Today, driving home in about 85+ degree weather, water temp
around 190-200, with the Tiger A/C blowing, and my auxillary electric
fan on, I experienced another dreaded "bump" at about 40 miles an hour.
It feels like a "tap" or bump in the rear bumper, and the RPMs drop for
an instant, and then on again. This has previously been a precursor to
the car starting to stall from idle, and that one time a few months ago,
dying completely for a half an hour until it cooled down a bit. It
occurs to me that I think I've only had this problem in warm/hot
weather, and with the A/C (and maybe also the extra fan) on. I've got my
seperate condensor fan powered right from the battery. I have the
evaporator blower (the A/C fan inside the car) wired to the fuse box,
(through a relay), to the side of it that's hot only when the ign.
switch is turned on.
With everything running (A/C blower in the passenger compartment, the
condensor fan, plus the auxillary fan in front of the radiator), and
maybe the stereo too, there's a lot of juice going through the wiring
harness at once. I'm thinking I should also power the evaporator blower
directly from the battery instead of the fuse box, maybe lessening the
electrical load on the harness. Could it be, in hot weather, that all
that voltage running in various directions in a hot engine compartment
could cause voltage to momentarily drop off to the ignition (below its
required level), causing the electronic ignition to briefly shut down,
then start up again?
Steve Sage
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