Weak cruise - 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 03-21-2004, 04:25 AM   #1
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Default Weak cruise

I took my 92 for a test run after putting in new plugs, and my cruise didn't work. So I stopped, popped the hood, and reattached the vacuum hose that I correctly figured I knocked off. Bingo, but it slowly looses speed uphill and won't make itself go into boost, which it normally hits 9 psi (with full TC lockup, mind you ) up a few hills on my normal route home. Sounds like a vacuum leak, right? I firmly reattached the vacuum line. What'* the deal?
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Old 03-21-2004, 12:11 PM   #2
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I'd be looking for a cracked fitting or line. I still have some I need to replace eventually. I had a slow leak awhile back. It was a real bugger to track down.
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Old 03-23-2004, 02:43 AM   #3
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Fixed it. Not exactly sure what exactly did it. I just pressed on all my boots and fittings to make sure they were seated properly. None seemed to have a problem.
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Old 03-23-2004, 02:48 AM   #4
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If it comes back, get a tube of Dow Corning high vacuum grease for those fittings. Great stuff. I use it at work all the time for high-vacuum applications. It'll help keep them from drying out, too, and may rejuvenate them.
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