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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-24-2008, 06:13 PM   #1
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Default Bonneville Dieing

First off - I have a 1997 Bonneville SE

-Car dies at random while driving, I can pull over to the side of the road, turn off the car for a few seconds and it will start back up. This happened for about 2 months. A few days ago the Check Engine light finally came on. So yesterday I was on my way home to get the car checked out, and just my luck while driving on interstate it starts dieing again.

-I would be driving, and it felt like the car would only take so much gas. I would get it up to about 3k rpms, and when I would try to give it gas to go on, tachometer would rise a bit then just drop back down. I couldn't get my speed up to stay on the road so when I would pull off and stop..the car would stutter and eventually die. While this was happening the gas pedal became harder to press down. This happened 4-5 times before I finally made it to town to get my car pulled home.

Just curious what you might think it could be. Planning on having it hooked up to a computer to see what it says..and having the fuel pump checked out.
Don't really know where to go from there

-Thanks,
Frake
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Old 08-25-2008, 01:00 AM   #2
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**UPDATE**

Had the pressure on the fuel pump checked, its fine....Exhaust is extremely hot..seems to be pointed to the catalytic converter. Plan on hooking it up to a computer tomorrow to see why the check engine light is on, and going to check the cconverter tomorrow.

Any other suggestions?

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Old 08-25-2008, 07:33 AM   #3
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That seems to fit pretty well. When it goes on the computer have them watch the front O2 sensor to see if it'* toggling properly. It may have gone bad and caused the catalytic to clog.
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Old 08-25-2008, 11:44 AM   #4
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My guess - O2 sensor
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Old 08-25-2008, 05:34 PM   #5
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**UPDATE**

Got the catalytic converter off, and it had been clogged up. Plan on checking the o2 censor out soon. The computer said the check engine light came on due to the transmission slipping. Plan on getting it flushed Friday. I also wanted to ask if the Ignition Module could also be acting up and if it would show up on the computer if was.

Thanks for the feedback,
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Old 09-03-2008, 02:18 PM   #6
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Conclusion

It was the fuel pump. It was getting hot and breaking down loosing all pressure and causing the car to die. Now I just need a new starter, the bendix is shot.

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