94 Bonneville rpms drops and stalls - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-14-2005, 10:27 PM   #1
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Default 94 Bonneville rpms drops and stalls

Hi there,

I just picked up this Bonneville which is perfect in every way. Quite frankly, even though its a 94, I'm really in love with this car. It drives like silk (not counting the problems I'm about to list), the stereo sounds sweet;heck it even smells good..
.
.
Except for this tiny thing:

Some times, out of nowhere, the car will suddenly die, even if I'm driving. All the electronics stay on, but the engine stalls out. I put her in neutral and turn the key. Boom, everything works. Also.. when I'm stopped, I see the engine RPM almost fighting to keep her over 1k, like its having a car heart attack. Some times it wins the battle and I'll get a tiny kick and the car doesn't stall, others it'll stall out (neutral, restart).

Also, while the car is in park, if I rev the engine, it works great, it the RPMS climb like they're supposed to, however I can't get rapid acceleration. When I put her in gear and step on the gas, even if I peddle it to the metal the car slowly builds momentum.

Any thoughts? I'm hoping the extra detail might help you guys could offer because I've read all the various responses on this forum and another and I'm really concerned I'm going to wind up replacing everything under the sun. Any thoughts? Cam sensor maybe? (BTW the tranny shifts smooth)

Regards,

Aaron Schlesinger
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Old 09-14-2005, 11:00 PM   #2
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The random stalling, is there any rhyme or reason to it? How often does it stall like that?

We have a 97 SSEi that maybe experiencing the same problem.

As for your other problems....Sound like a pretty descent exhaust leak.
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Old 09-14-2005, 11:04 PM   #3
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Quote:
Originally Posted by LakevilleSSEi
The random stalling, is there any rhyme or reason to it? How often does it stall like that?

We have a 97 SSEi that maybe experiencing the same problem.

As for your other problems....Sound like a pretty descent exhaust leak.

Hmm.. Exhaust leak? Any thoughts if this is something internal, or part of the external undercarriage? As for the stalling, no there'* no real rhyme or reason to it, except that it is happening more often over the last two days.
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Old 09-14-2005, 11:08 PM   #4
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I'm sorry, I mean't VACCUM leak......

Sorry my heads been in the clouds lately LOL

We have a 97 SSEi here with the stalling problem, but don'est do it that often.....
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Old 09-14-2005, 11:12 PM   #5
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Quote:
Originally Posted by LakevilleSSEi
I'm sorry, I mean't VACCUM leak......

Sorry my heads been in the clouds lately LOL

We have a 97 SSEi here with the stalling problem, but don'est do it that often.....
You rock. Think the vacuum leak might have anything to do with the other problem? I'm leaning right now towards letting a mechanic deal with the stall out problem because I'm a newbie when it comes to real engine work, but the vacuum tubes I might have the stones to start monkeying with.
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Old 09-15-2005, 10:38 PM   #6
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Default Followup to 95 Bonneville RPMS drop and stalls

Hey folks - as a follow up to my stalling bonnie of doom, which I've heard is a common problem, here was the end result:

1) The main real problem: The Throttle Control Sensor was totally screwed up. This also turned out to be the factor in why I wasn't getting any acceleration or real horsepower from the car.

2) Low gas levels at times were causing the car to think it was totally out of gas when on a hill. I'm not sure if there'* a problem with the floater in the tank, but I'm not letting it below half a tank where I can avoid it.

Anywho.. my baby is smooth as silk and I'm in love with this car.

Regards,

Aaron
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Old 09-15-2005, 10:55 PM   #7
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well glad to see that she is fixed and running great again
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Old 11-23-2010, 03:45 PM   #8
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HEY DUDE , Having same prob with my 94 bonn,if it;* like mine it will throw no codes, either. since your don't stall, idle sensor or maf sensor, before changing these, try to take off air cleaner hose, while car is running spray throttle body cleaner into intake rev motor with free hand as it will stall, sometimes its just dirty, exhaust will show you if a puff of crap comes out, also tap with plastic end of screwdriver on sensors around intake while its running , listen if it falters at all,
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Old 11-23-2010, 07:49 PM   #9
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Quote:
Originally Posted by Mortehl View Post
Hey folks - as a follow up to my stalling bonnie of doom, which I've heard is a common problem, here was the end result:

1) The main real problem: The Throttle Control Sensor was totally screwed up. This also turned out to be the factor in why I wasn't getting any acceleration or real horsepower from the car.

2) Low gas levels at times were causing the car to think it was totally out of gas when on a hill. I'm not sure if there'* a problem with the floater in the tank, but I'm not letting it below half a tank where I can avoid it.

Anywho.. my baby is smooth as silk and I'm in love with this car.

Regards,

Aaron
Your fuel issues seem to be due to a faulty Fuel Level Sensor on the fuel pump.

Have you ever had the fuel pump changed?
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