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Pontiac Bonneville Starting/Stallling/Ignition Problems

233 messages,  Last post on Mar 10, 2013 at 5:56 PM

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What is this discussion about? Pontiac Bonneville, Auto Repair, Sedan

Messages Page 23 of 24

#221 of 233 Re: 01 bonneville stalling/engine cut off [wicked7] by imidazol97

Mar 27, 2012 (2:46 pm)

Replying to: wicked7 (Mar 27, 2012 12:46 pm)
It could be fuel pump failing. You could install a fuel pressure gauge taped to the windshield with duct tape while you drive and watch.
 
Also, it could be a fuel pressure regulator with a leaking diaphragm. That switches the amount of pressure at the injectors based on vacuum. You can check for raw gasoline in the line by pulling it off of the fuel pressure regulator (on front of engine on driver side with one vacuum line going to it--it will be shown on the vacuum diagram under the hood).
 
And it could be the crankshaft position sensor. With that the tach would drop to zero and be your first sign the engine is dyiing, because the engine loses ignition control to trigger spark when the position sensor fails.
 
People say splashing cold water on the crankshaft position sensor to cool it speeds up the restart if it consistently has to wait to cool before the CPS starts working again. It's behiind the edge of the balancer pulley.

#222 of 233 My 96 Bonneville randomly quits firing the plugs by wolfman2020

Apr 06, 2012 (11:43 am)

My 96 Bonnevile SE started shutting down while Im driving down the road about 5 minutes after I got on the road, I would keep trying to start it over and over and finally it would crank and seem to do fine for another week. Then it would not start one morning at all so I checked for fire at the plugs and there wasn't any. I watched as my wife kept trying the key and it would fire for a second and stop, after alot of tries it starts, Its been so intermitent that I wasnt afraid to drive it but Its gotten now where I dont want to chance it. Could it be in the switch itself and how can I check the switch,(does the steering wheel and air bag have to come off to replace the switch)? Thanks

#223 of 233 Re: My 96 Bonneville randomly quits firing the plugs [wolfman2020] by kkcolorado

Aug 03, 2012 (9:23 pm)

Replying to: wolfman2020 (Apr 06, 2012 11:43 am)
My brother has a 2001 Bonneville and has had this problem as you've mentioned above. He's thought of replacing many of the same items, but no one could diagnose what was causing the shut off in the middle of the highway shortly after starting to drive. As it turns out, today it was diagnosed as the Ignition Switch. It's not been replaced yet, but hopefully this will fix his problem and hopefully this helps all of you with similar issues!

#224 of 233 Re: 1995 pontiac bonneville se [glenn36] by casoriagag

Sep 09, 2012 (7:10 pm)

Replying to: glenn36 (Jan 30, 2012 9:32 am)
Hi--what is the update on your car. I have a 2003 Pontiac Aztec--the problems you are discussing sound identical--car shuts off even on the highway at 60 mph. Gives me these security lights and then drops the gas light as if I have no gas, shows it to empty and then the call stalls, I pull over, start it up and I can go again. I have had other things fixed and doesn't fix the problem. The last I heard tonight is it can be the ignition control modual. Is that what it was for you?

#225 of 233 Re: 1995 pontiac bonneville se [casoriagag] by wolfman2020

Sep 10, 2012 (3:00 am)

Replying to: casoriagag (Sep 09, 2012 7:10 pm)
Crankshaft position sensor, someone had told me to ck it so I went to auto parts store and they put a code reader on it and that was the answer and the fix.. Good Luck I know I love my Bonneville and would drive it forever if it will let me..

#226 of 233 Re: 1995 pontiac bonneville se [wolfman2020] by imidazol97

Sep 10, 2012 (6:56 am)

Replying to: wolfman2020 (Sep 10, 2012 3:00 am)
> they put a code reader on it and that was the answer and the fix
 
I thought the CPS did not set any kind of code? That's what makes it difficult to diagnose using circumstantial evidence as to its being bad or not.

#227 of 233 Re: 1995 pontiac bonneville se [casoriagag] by imidazol97

Sep 10, 2012 (6:59 am)

Replying to: casoriagag (Sep 09, 2012 7:10 pm)
>--car shuts off even on the highway at 60 mph. Gives me these security lights and then drops the gas light as if I have no gas, shows it to empty and then the call stalls,
 
I would check the ignition switch carefully. I do not know anything about the physical arrangement of the parts on your car, but that ignition switch can have different contacts for different services. As it heats while the car's running, individual contacts can lose connection while others stay in contact. Heat, vibration, burning, can lead to the bad contact while running.

#228 of 233 2000 pontiac bonneville fuel pressure by yamiracer

Dec 28, 2012 (5:10 pm)

00 bonneville that will start and run but hit throttle and dies. Have replaced fuel filter, fuel pressure regulator, thought maybe cat was plugged but eliminated that and still runs like crap. Once it warms up, it will just start up and shut off. Will not hold fuel pressure with key on not running, once running has pressure, not sure how much dont have guage. Have checked all vacuum lines and cannot find any leaks. When I first start it up I can drive it down road and seems to go ok but if you kick it down seems to not have a lot of power or cuts out funny. Have been digging around a bunch and am stumpped. Any help or ideas would be appreciated. thanks

#229 of 233 Re: Car died [tamwa] by 96bonnimom

Jan 08, 2013 (1:42 pm)

Replying to: tamwa (Nov 25, 2006 3:06 pm)
hello tamwa, did you get your problem resolved? If you did could you post on here what you did to get it going again.
 I am having the same kind of problems with my '96 bonneville ssei supercharger.

#230 of 233 Re: 2000 pontiac bonneville fuel pressure [yamiracer] by imidazol97

Jan 08, 2013 (3:58 pm)

Replying to: yamiracer (Dec 28, 2012 5:10 pm)
You need to verify your fuel pressure. You can get loaner pressure gauges at certain auto parts stores in this state of Ohio. Don't know where you live.
 
The pressure should be tested with the engine off and the key on. The pump will run a couple seconds and then shut off. The pressure should hold unless there's a bleed down from a leak or the fuel pump. Then the pressure should be checked with the engine running at idle, and then the pressure noted when the engine is accelerated causing the vacuum to reduce which lets the fuel pressure regulator up the pressure.
 
Second choice would be the MAF sensor may need cleaning.

Messages Page 23 of 24

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