1989 Chevy Corvette Starting

TOM L NICHOLS

MEMBER
1989 CHEVROLET CORVETTE
V8
2WD
AUTOMATIC
158,066 MILES

Car only starts when cold. It will run good all day,
but if you turn it off it won`t start until the next day.
It doesn`t matter how long you run the car. Once
you turn it off, that`s it until the next day.
Cranks no start after run once. Thanks TOM

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Next time it doesn't wanna start don't wait for nothing-do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

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Sunday, November 15th, 2009 AT 4:14 PM

TOM L NICHOLS

MEMBER
2 POSTS

Thank you for the reply.I found the problem, but not
the solution. When you move the ECM or move the
wiring harness (ECM) the engine dies. If you move and
twist the harness, the car will start.I found this when
I replaced the ECM. The ECM had already been replaced,
along with fuel pump, filter, relay, distributor, and other
stuff by who knows who.I know I have to run a pin test,
but are the intermittant open circuits usually found at
the ECM connector, or at the firewall behind the right
valve cover? Thank you and I hope I have provided you
with enough information.I forgot to add that it`s a
convertible. Are replacement harnesses available?
Thanks again, TOM

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Thursday, November 19th, 2009 AT 6:33 PM