rough idle - Page 4 - 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 01-28-2010, 12:38 PM   #31
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no thank you.
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Old 01-28-2010, 06:10 PM   #32
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Well my buddy has the HPTuners VCMScanner on his laptop and i had him clear the codes and run it again after a little drive. the MAF code came up in like 5 seconds. it stayed at like .23lb/min no matter where the throttle was, so im assuming thats what is wrong. no?
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Old 01-28-2010, 07:03 PM   #33
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Those MAF readings should change with the amount of airflow moving through the intake.

Before we send you off spending over a 100 bucks and does for a new sensor, try this test to make sure your MAF is getting power.
https://www.gmforum.com/trouble-shooting-test-procedures-141/maf-voltage-test-284382/
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Old 01-28-2010, 08:18 PM   #34
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The MAF readings will change. Unplug the MAF, does anything change? If not, the MAF is more then likely bad.
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Old 01-28-2010, 10:06 PM   #35
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Quote:
Originally Posted by Mike1995 View Post
Those MAF readings should change with the amount of airflow moving through the intake.

Before we send you off spending over a 100 bucks and does for a new sensor, try this test to make sure your MAF is getting power.
https://www.gmforum.com/showthread.php?t=284382
i know they should, thats why im assuming its the sensor. ill pull out the multimeter tomorrow hopefully.

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Originally Posted by Danthurs View Post
The MAF readings will change. Unplug the MAF, does anything change? If not, the MAF is more then likely bad.
ill see if i can get him to rescan in and try that out.
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egr valve, maf, rough idle, tps, vacuum leak

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