Tune up notes..... - 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 07-06-2004, 01:49 PM   #11
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along, any difference in the idle speed after reinstallation of the TB? I recently gave mine the same treatment and the idle quality is greatly imporved but now the car idles at 1500 RPMs. I posted this topic the other day and tried the suggestions given but there was no change.
Did you replace the gasket?? Or used the old one? If it'* the old one.. it maybe torn allowing vacuum draw or air before the butterfly opening.. so thus increasing RPM.. if you smoke or have something similar.. start the car in idle @ 1500 RPM and hold the smoke around the TB.. if there'* a leak you'll see the smoke getin sucked in
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Old 07-06-2004, 01:57 PM   #12
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Originally Posted by randman1
along, any difference in the idle speed after reinstallation of the TB? I recently gave mine the same treatment and the idle quality is greatly imporved but now the car idles at 1500 RPMs. I posted this topic the other day and tried the suggestions given but there was no change.
Did you replace the gasket?? Or used the old one? If it'* the old one.. it maybe torn allowing vacuum draw or air before the butterfly opening.. so thus increasing RPM.. if you smoke or have something similar.. start the car in idle @ 1500 RPM and hold the smoke around the TB.. if there'* a leak you'll see the smoke getin sucked in

and lets just hope for Randman'* sake that there are no fuel leaks where he is using a lit cigarette to fault find........
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Old 07-06-2004, 02:22 PM   #13
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Originally Posted by randman1
along, any difference in the idle speed after reinstallation of the TB? I recently gave mine the same treatment and the idle quality is greatly imporved but now the car idles at 1500 RPMs. I posted this topic the other day and tried the suggestions given but there was no change.
Did you replace the gasket?? Or used the old one? If it'* the old one.. it maybe torn allowing vacuum draw or air before the butterfly opening.. so thus increasing RPM.. if you smoke or have something similar.. start the car in idle @ 1500 RPM and hold the smoke around the TB.. if there'* a leak you'll see the smoke getin sucked in
Yea, I did reuse the gasket. It looked good but I guess you can't really tell just by sight. I've already located a gasket at a local dealer and will change regardless.

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and lets just hope for Randman'* sake that there are no fuel leaks where he is using a lit cigarette to fault find........
That would put a damper on all the fun, wouldn't it! I nearly used starter fluid to check for leaks by spraying it on some suspicious vacuum lines and the TB gasket but figured I'd better not. My neighbors might have thought that it was leftover fireworks.
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