96 Bonny will fire but will not stay running - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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 04-25-2005, 11:09 PM   #21
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Andy - glad to hear you got it running. That'* a lot of work over a vacuum booster.
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Old 04-25-2005, 11:21 PM   #22
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WOW! Didn't you have power brake problems as well, or a loud vacuum noise to lead you to look there? Amazing how something so simple can have you jumping through so many hoops. I have been known to overlook the obvious and suspect the worst myself.
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Old 04-26-2005, 10:55 AM   #23
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Default Re: IT'* FIXED!!!!!

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Originally Posted by Andy King
The problem turns out to have been the large vacuum line that runs from the brake booster to the upper intake manifold on the back of it. It is probably 1 inch in diameter and that end at the manifold popped out. That huge vacuum leak is what was causing all of my problems.

This is one for us all to file away incase it happens to someone else.

Thanks for all your help

Andy
LMAO... It happens Man... Glad you got it...

The air was Bypassing the MAF so there was almost no measurement from the MAF showing the PCM that there was more incomming air... Interesting tho...

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Old 04-26-2005, 11:31 PM   #24
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Hi all

Yeh it was a very strange problem. It ran fine Friday night when I drove home and shut it down. There was absolutely no issues. Saturday morning when I went to start it is when all the symptoms showed up. It must have been just barely in the manifold and then fell out.

I did not have any kind of power brake issues at any time. Very strange deal. And yes it was a lot of work for basically a huge vacuum leak. It is a good thing that we like tinkering with our vehicles or I might be a little mad.

thanks again for everyones ideas

Andy King
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