Technical Tips > Post 84

Cold Start Problem

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John Moore:
I am having cold [first] start problems with my '88 convertible. It started to be just acccasionaly every now and again but now it's regularly like this. It cranks over OK without firing then it will cough and splutters a few tmes before it finally starts and settles into it's normal idle. Once running and at normal operating temps if I turn it off and re-start it starts with no problems. Do I have a fuel problem, I have heard of injector leak down and if that is the problem what do I do to fix it.
By the way I have owned this car for many years and it was mirror converted by Corvette Connection in 1993.

VET-005:
John,

First thing to do is a computer codes test. This should tell you if you have any electronic faults such as sensonors or air flow meter burn back relays etc. In saying that if you do a codes test and you get an all systems pass you need to start looking at other things such as fuel reg vacume problems and injector leak. If all this is good then you have an ECU problem. I recently had all of these symptoms in my work car and found the computer to have s#!t itself. The computer can diagnose everything accept itself, and i would be checking everything else before i go replacing an ECU. If does end up being the ECU you won't need to replace the memcal as it will be fine.

Good Luck if you need any help just ask!!!

77CVT:
Do 88's have the cold start injector like the 85's?

I'd do a fuel pressure test and check the timing, plugs, leads etc.  Injectors don't last forever so if you have the time and spare $$ it wouldn't hurt to get them checked and cleaned at some point.  What do your plugs look like?

If you can find someone with an '88 willing to swap ECU's and start it cold that will at least eliminate a major fault.

White88:
Yes 88's do have a cold start injector. Leaking injectors (not cold start) normally affect hot starting , so I don't think it's that or the ECU because it seems ok after it fires up and clears. I would be looking at possible the reguator / fuel pump first , then cold start injector.

77CVT:
Here is an old thread that might be of use.

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