Starting issue

pontiac

#1

I have 99 grand am that has issues starting when warm. It will start but it its hard to get it started, now it has a bad idle almost wants to stall out. I have diagnostic done twice that shows nothing wrong with the car. Fuel pump turns on and reads that it hold pressure. I have replaced spark plus, boots, fuel filter, o2 sensor, used fuel injector cleaner & caberator cleaner. Still has same problems? I have seen 4 mechanics no one can diagnois the issue. Is there anyone out there that has had a grand am with the same issue? Anyone that has any idea what it can be? Cant keep wasting money and cant afford a new car right now. Please help.

Thanks

Tracy


#2

One thought is cleaning the throttle body and IAC circuit. If air cannot get in, the car cannot run.


#3

How come only when its warm though? When i first start the car and its cold it fires right up without hesitation and its cold in the morning, then usually most starts after that i have a problem.


#4

When cold, the IAC opens up a lot to idle the engine up. Once warm, it doesn’t need to open as far, and dirt and crap cuts the airway even more.