1991 s10 p/u dies when warm, can't restart until it cools


Asked by Nov 18, 2014 at 11:31 PM about the 1991 Chevrolet S-10 STD Extended Cab 4WD SB

Question type: Maintenance & Repair

My 1991 chevy s10 dies shortly after reaching normal operating temperature.

I had initially not made the temperature connection, so replaced the fuel pump the going
it may be going out.

So far I have verified spark at the coil, when in the hot (no start) condition, and looking
into the throttle body I see the injectors pulsing out fuel. I think the pulse means the
computer thinks the motor is flooded?

I've also noticed that when cold (as in freezing) I need to give it a little gas or it will not
idle until the motorwarms up a bit. Once it gets past this point, it idles nice and smooth
until reaching normal operating temp.

I'm guessing one of the sensors or controls is misbehaving when it warms up, but I'm
having trouble guessing which one

4 Answers

jump pins a and b with a wire and read codes on dash. they give the jumper tool away at autozone


Make sure the coolant temp sensor for the computer is good. Also check the ign control module in the distributor. If you take it out and take it to a parts store they can test it

2 of 2 people found this helpful.
Best Answer Mark helpful

It was indeed the coolant temp sensor for the computer, I had overlooked the fact that the temp gauge is driven off a different sensor than the computer for this engine so had assumed the temp sensor was good. Thanks.

1 of 1 people found this helpful.

Had the same problem but mine WAS the ignition control module.

1 of 1 people found this helpful.

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