Hello,
I have a 1991 grandprix with a 3.1 liter V6 engine. When I start the engine it runs fine until it gets warn then it begins to run rough and eventually dies; then it wont start up until the engine cools down. So far I have replaced the coil pack,looked at the ECM, cleaned the EGR valve, replaced the IAC, changed the plug wires. I have also had problems with the electric fans not coming on so I have also replaced the temperature sending unit. Still have problems need help please
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