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Old 12-07-2009, 02:13 PM   #1
Cmal
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Unhappy Another stalling problem (95 GS)

Alright, so my 95 3.8L regal gran sport stalls whenever I stop the car. I have to keep one foot on the gas to keep it around 1000rpms or it will stall every time, without fail. If I don't keep a foot on the gas it will bounce between 500 and 1000 rpms and stall. After start up it will run fine for the first 3-5 miles, then the problems start. Also, sometimes it won't turn over right away. It cranks for a good 5-10 seconds and then turns over. This doesn't happen every time and it always starts right up after it's been running, including after it stalls. The battery is new and I just had the fuel pump replaced (the stalling started less than a month after replacing the fuel pump). Any help would be greatly appreciated!
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Old 12-08-2009, 10:57 AM   #2
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Re: Another stalling problem (95 GS)

Did the service engine soon light ever illuminate? It does noramlly come on when the engine stalls, but I mean after you start it up or when the car is running does it come on? If so you should get the codes checked at a shop. Unfortunately, your Regal is one is one of those different cars that you can't just use a jumper in the ALDL port with and you can't use an OBD-II scanner like the parts stores usually use either.

I suspect your problem is either vacuum or temperature related. Check all the vacuum hoses and make sure the air intake clamps are tight. Your coolant temp sensor (not to be confused with the temp switch/temp sending unit) may be bad causing the car to run too rich after the engine warms up.

It could also be a bad fuel pressure regulator. It's the little round part at the end of your rear fuel rail and has a vacuum line going to it. If you pull the vacuum line off and see/smell gas this part is bad.

This is a long shot, but have you ever replaced the vacuum modulator? It is located on the front of the transmission and has a vacuum line going to it. When the these fail, transmission fluid sometimes gets sucked into the vacuum line and eventually into the engine through the intake plenum. The car shifts noticably harder after these fail, but if the modulator has been bad since you've owned the car you may not notice this. A new vacuum modulator is fairly cheap at around $15.

Given the car's age, it could be a combination of these things causing problems too so keep that in mind as well.
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Old 12-08-2009, 12:14 PM   #3
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Re: Another stalling problem (95 GS)

Yes, the service engine soon light does come on, usually right after start-up. I had the codes checked in October when I had the fuel pump replaced, so whatever the problem is it began after than.
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Old 12-12-2009, 03:41 PM   #4
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Re: Another stalling problem (95 GS)

New symptom: It started up, but with almost no power and a strange almost grinding noise. I shut it off, and started it up again immediately, and it started fine, and drove home fine, as long as I kept one foot on the gas at all times.
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