Question about 1990 Pontiac Grand Prix

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I start it and it runs fine till the temp comes up to about 150 and then dies and wont restart till it's cool again. Blink code flashes 1-2 only. 3.1 v-6

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One long flash and two short flashed means the ECM is working fine
check and see if the EGR valve is stuck closed when the engine gets hot
If stuck closed the EGR valve needs replacing for it supposed to open when hot

Posted on Mar 12, 2011

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Posted on Jan 02, 2017

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Quits after warm up wont restart


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the one thing in your statment is the knockes/knocking this what is known as the big ends and indicates the engine is under pressure and needs a lot of repair.If when you start the engine when cold if you stand at the back of the car and if the smoke coming out of the exhaust has a blue tint/ie like a old ladys hair tint ,as im sure you will see.[bottom line] the engine needs replaced.adrian,,,,

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Temp light comes on car dies and wont start until cools


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