Some Problems with my 92 SSEI - Page 2 - 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 09-25-2009, 02:46 PM   #11
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don't know, it'* my first forced-induction vehicle... maybe not the last.
but it'* a huge challenge for me, over here in germany, to deal with several problems the car has.

with my trans am, there were no problems... lot'* of parts available, very easy to work on... huge difference... but also in quality
as a daily driver, i wouldn't want to miss the bonnie... quiet, comfortable, well equipped, enough power to the wheels, and relatively cheap to drive ( a smart car would be almost the same *g*.. what a comparison )
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Old 09-25-2009, 03:53 PM   #12
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A boost gage is reading air pressue in the intake manifold. It should read vacuum (a negative reading) at idle, 0 at medium acceleration, and +7 to +9 psi at WOT. On a car without a */C (like your Trans Am) it will read 0 at WOT.
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Old 09-25-2009, 03:56 PM   #13
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so my boost control should work... thanks alot for the info
some days ago I ordered some new ign. coils, wires and plugs....
hope it solves my problems...

next week, they'll arive, and then we'll see...

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Old 09-25-2009, 03:58 PM   #14
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Quote:
Originally Posted by 2kg4u View Post
A boost gage is reading air pressue in the intake manifold. It should read vacuum (a negative reading) at idle, 0 at medium acceleration, and +7 to +9 psi at WOT. On a car without a */C (like your Trans Am) it will read 0 at WOT.
Ah that makes perfect sense. So it would follow then that if you see a boost gauge going back and forth between (-10) - (-7) at idle that you have a vacuum leak?
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Old 09-26-2009, 09:04 PM   #15
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You have the most vacuum at engine idle. If the engine idle speed is steady, and you aren't turning accessories on and off (like A/C in particular) the vacuum should stay faily steady. Fluctations are a possible sign of a vacuum leak.

By the way, if you are making your observations based on the gage in your car, they are not very accurate. Purchase and install a vacuum gage. I think there are elaborate ones that run vacuum to an electronic sensor which then sends a signal to the gage in the car, but I used a simple gage that measures vacuum directly and ran a vacuum hose from the intake manifold into the passenger compartment.
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