I have been having problems with my 91' and looking for some advice.  I have taken it out several times since being stored for the winter for about 15-20 min trips.  Towards the end of the trip the engine starts to run/idle rough.  Once I shut the car off I have to wait until the engine is completely cool until it will start and run again.  It will crank and crank but not fire until it is cool.  The SES light is not on.  Has anyone else encountered this problem?

might want to check your fuel pressure. i put in an adjustable regulator and not realizing it set the pressure to high. was ok on a cold start but when it warmed up it wouldn't start. readjusted it and everything was fine.

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the dynamic duo

c3vr life member #97

I would be most suspicious of the HEI module, or the coil, first. It could also be a fuel problem. Best way to check that would be to install a pressure gauge on the fitting, and see what the pressure is when it starts cold, and then compare it to when it shuts down/won't start. Could be that the fuel pump is on it's way out, or maybe the "sock" filter on the end of the pick-up tube is sucking up crap from the tank, and stopping it up.

My bet is on the HEI module, from the description of the problem....


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Joel Adams  
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

My bet is on the injectors.

I ended up replacing the injectors.  They were original.  While I had everything apart I decided to replace all 8.  What a difference it made.