93 Old's Random Idle - 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 03-02-2008, 11:29 AM   #11
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Default Re: 93 Old'* Random Idle

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Originally Posted by acidcrashdburnd
My friends thinks it has somthing to do with the 160 tstat i put in my car about a year ago he said it might be kicking into open loop or also the EGR could ..
Does a 160 thermostat work in these cars? I know some use a 180...

Could that be a factor here?
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Old 03-02-2008, 11:32 AM   #12
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Default Re: 93 Old'* Random Idle

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Originally Posted by imidazol
Quote:
Originally Posted by acidcrashdburnd
My friends thinks it has somthing to do with the 160 tstat i put in my car about a year ago he said it might be kicking into open loop or also the EGR could ..
Does a 160 thermostat work in these cars? I know some use a 180...

Could that be a factor here?
worst case scenario, short-term, the pcm wouldnt see temp it wants (iirc 130 deg F), and run in open loop, for longer.
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Old 03-02-2008, 11:58 AM   #13
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And while it runs rich for longer, it fouls out spark plugs, O2'*, and catalytic converters. Go back to a 180.

Running too rich for too long will affect your idle. I'm also concerned about you using brake cleaner on the MAF. It might be time to swap in a spare.
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Old 03-02-2008, 03:05 PM   #14
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Quote:
Originally Posted by samueljackson
Quote:
Originally Posted by acidcrashdburnd
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what did you use to clean the MAF?
TB cleaner then it was making it throw codes so then i cleaned it with brake cleaner
btw my abs quit working today i love my 93 money pit
thats your problem, you NEVER want to use something that aggressive on the maf. i have a couple extras that should work for you. can you post your oe # stamped on the part.
im currently not with my car but when i get home i will get the number for you
thank you!!
oh what should i clean it with?
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Old 03-02-2008, 03:09 PM   #15
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they make a cleaner specific for maf sensors.
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Old 03-02-2008, 03:09 PM   #16
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Default Re: 93 Old'* Random Idle

Quote:
Originally Posted by samueljackson
Quote:
Originally Posted by imidazol
Quote:
Originally Posted by acidcrashdburnd
My friends thinks it has somthing to do with the 160 tstat i put in my car about a year ago he said it might be kicking into open loop or also the EGR could ..
Does a 160 thermostat work in these cars? I know some use a 180...

Could that be a factor here?
worst case scenario, short-term, the pcm wouldnt see temp it wants (iirc 130 deg F), and run in open loop, for longer.
hmm I have had no problems with the 160 tstat its been in for maybe 15 months now and it idles up when its around 200F+ so i dont think its the tstat but i will go buy and try one friday my next day off =D
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Old 03-02-2008, 03:19 PM   #17
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keep in mind, my explination was short term. pay attention to wren'*. if it has been there for more than a year, that could be the root of your problem.
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Old 03-02-2008, 03:36 PM   #18
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Quote:
Originally Posted by samueljackson
keep in mind, my explination was short term. pay attention to wren'*. if it has been there for more than a year, that could be the root of your problem.
thank you for your help im gonna buy a 180 tstat and pop it in and see what happens..... i had put the 160 in i think 2 summers ago i cant really remember when i put it in to be honest but regardless i put it in for my air conditioning i was down to the bigger fan only the condenser fan died and i didn't replace it until September of 07 its hard when you work like me...
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