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98 Grand Am 2.4 stumbles, dies


cperficio
07-25-2011, 10:09 AM
98 Grand Am SE w 2.4l 70,000 miles 5sp
Issue: car stumbles at low speed turns (pulling into a parking lot) or when stopping at a red light and dies. Clever throttle management (clutch disengaged and revving the RPM) can keep the car running Car runs perfectly otherwise. Problems seem to be most apparent about 2200rpm. Something else I've noticed that might help a car detective... the A/C seems to shut off just before I stop for the red light. The fan blows but while sitting at the red light the temp inside the car reminds you that it is summer time in Louisiana. Once I take off from the red light A/C returns, car zooms off until I start slowing down for a turn or another red light.
We removed the IAC and cleaned it and the port it is fitted in and gave the TB a good cleaning while I was there. I replaced plugs and the boots. No change. I guess I could've changed the fuel filter, it has about 20,000 miles on it and when I go for another part I'll get one.
Some of these sensors aren't so cheap and I'm looking for some advice before I starting buying parts.
Anyone have an idea?

Hungrycat7
07-25-2011, 04:15 PM
Check engine light on? Sounds very similar to what I just went through with my girlfriends car. . . Ended up being a vacuum leak. It was a small hole in one of the hoses. I could not hear the leak so it was difficult to find. But her car would die at slow speeds or at idle. Right before stalling out the radio, A/C, and any other acc. inside would turn off.

cperficio
07-25-2011, 11:41 PM
NO SES light, sorry... I should've said that.

THANKS for replying.

cperficio
07-27-2011, 06:54 PM
Bingo. Vacuum leak.
A small hose under the TB was in serious condition and compromised. I bought a replacement at Autozone that was the same ID but the wall was much thicker. It should last much longer.

Thanks for the reply...

Hungrycat7
07-28-2011, 11:31 AM
Glad it was an easy fix. Those vacuum leaks can be a real pain and take a lot of time to identify. Congrats!

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