Lower Idle after Wire and Plug Tune Up - 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 07-07-2007, 01:25 AM   #1
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Default Lower Idle after Wire and Plug Tune Up

I just installed Autolite 605'* and MSD 8.5MM wires, everything seems to run fine while under acceleration but when im at a stop sign or red light, my RPM'* seem to fluctuate between 1000 and 500 and bucks a little, i did have a misfire code on cyclinder 6 but i fixed this problem and i do not have any codes anymore.. any idea what this could be, i am still using my stock coils ...
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Old 07-07-2007, 01:38 AM   #2
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Are all your connections tight? Is/was a plug wire contacting the O2 sensor wires?
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Old 07-07-2007, 01:59 AM   #3
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maybe a cracked insulator on a plug?

Do you have a OHM meter to check resistance of the wires?
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Old 07-08-2007, 11:45 PM   #4
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Default fixed flucuation idle

Cyclinder 6 spark plug gap was almost complety closed but wasnt setting a code , fixed the gap and everything seems fine
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Old 07-09-2007, 12:01 AM   #5
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congrats
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Old 07-09-2007, 10:32 AM   #6
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Default Re: fixed flucuation idle

Quote:
Originally Posted by jacwashere7
Cyclinder 6 spark plug gap was almost complety closed
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Old 07-09-2007, 10:35 AM   #7
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If you hadn't found #6 to be uh.. "improperly gapped" I would have suggested turning off the AC. Many mistake the AC cycling and adding engine load as a problem .
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