rough idle - Page 3 - 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, 11:53 AM   #21
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just got back from autozone an it has some new codes form last time.

P0446 (EVAP)

P0122 (TPS)

P0113 (IAT Intake Air Temp)

P0102 ( MAF)

It also threw a P1870 code but i am not too worried about that.

Now considering I unplugged the TPS and probably the IAT sensors last night to see if that affected the idle. I am going to assume that those codes came from doing that and not an actual problem in the sensor.
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Old 01-28-2010, 11:57 AM   #22
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I'm still thinking your EVAP purge valve is bad or you have a leak in the EVAP line. I suggest just replacing the lines as I'm sure they are old and ready to go anyways.
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Old 01-28-2010, 11:59 AM   #23
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what should that cost me?
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Old 01-28-2010, 12:11 PM   #24
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For just the vacuum lines, I think a roll of generic vacuum line is around $10 or so at autozone.
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Old 01-28-2010, 12:13 PM   #25
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Quote:
Originally Posted by Danthurs View Post
For just the vacuum lines, I think a roll of generic vacuum line is around $10 or so at autozone.
oh, well i like that. haha. if it isnt a vacuum leak. whats the next on your list?
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Old 01-28-2010, 12:16 PM   #26
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Right now it'* looking like a vacuum leak. But if it still gives you trouble the EVAP purge solenoid would be next on my list.
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Old 01-28-2010, 12:27 PM   #27
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hmm. i wish it wasnt so damned cold outside, or id go out there now and do some diagnosing.
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Old 01-28-2010, 12:30 PM   #28
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Want to trade? It'* 4* here and I'm changing a CAM.
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Old 01-28-2010, 12:32 PM   #29
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depends. is it windy there?

with the wind chill its -1* here.
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Old 01-28-2010, 12:34 PM   #30
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Ya windy too.
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