Question about 1988 Chevrolet S-10

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Chev. S10 starts but stop's immediate when hot

I have a 1989 chevrolet S10 has 2.5 liter (iron duke) engine, has 178,000 miles. the truck runs great but if you let it idle for about 10 mins. at operating temperature the engine starts loping and has no throttle respone. if you shut the engine off and restart it the engine starts, runs and stops immediately until it cools down. any advice would help. Here is a list of the parts that are new.

new spark plugs
new spark plug wires
new disributer cap and rotor button
i checked and set the timing.
check all vacum lines
new EGR valve
new PCV valve
new fuel filter
new throttle position sensor
and some other odds and ends

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Check the module in ditributor.it sends a pulse to injectors.

Posted on Feb 18, 2009

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Check compression, at that many miles the exhaust seats could be wearing up into head causing valves to stay open longer loosing compression,while the engine is cold oil is thicker ,lifters pump up further do to thick oil when oil thins out you have less lifter pump up thus working working properly check compression cold should be 125 low to 155 any less than 100 you have valve prob.

Posted on Jan 26, 2009

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