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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 07-27-2010, 08:22 PM   #11
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ok i wil give it a try i will have to buy carb cleaner tomorrow
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Old 07-27-2010, 08:23 PM   #12
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make sure not to get any on the o-ring or anything else rubber you come across, i believe it will slowly eat through it...
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Old 07-27-2010, 09:08 PM   #13
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will i be able to compress the piston and spring after its clean or will i have to put it back in to see if it works
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Old 07-27-2010, 09:18 PM   #14
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i was able to move it back and forth without trouble when i did it... just don't connect it to power without it being in the TB, or else it will shoot out somewhere... and i don't know if you can undo that easily.

the FSM actually states that you SHOULDN'T move the pintle on a used IAC, but on a new one if it'* extended further than 28mm from the mounting surface, you have to SLOWLY press it in until it'* less than that... so take it for what it'* worth, i never damaged mine.

after installing it, and the connector is hooked up, roll the ignition forward, wait a few seconds, then turn it off. do that two or three times, then attempt to start. that will let the ECM know where the maximum and minimum positions are. you'll likely need to do an idle relearn too, but that'* easy enough to explain.
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Old 07-28-2010, 05:34 PM   #15
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well i hosed it down with b-12 and it is clean but it still wont move, plus something white came off and the piece at the bottom under the spring is cracked good thing they are only 50 bucks at oriellys
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Old 07-30-2010, 03:06 PM   #16
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OK got the iac replaced and it started up on the first try but it was smoking a bit when i revved it up and it smelled like it was running rich is this normal
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Old 07-30-2010, 03:10 PM   #17
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it likely has to learn new IAC characteristics. unhook the battery(or the ECM fuse(*)) for a while, then it should go through a learn procedure when it gets up to temp.
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Old 07-30-2010, 03:12 PM   #18
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ok thanks i was real worried there for a second
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Old 07-30-2010, 03:18 PM   #19
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most likey: the PCM is commanding it the way it commanded the old one, but since the newer one is likely flowing more air per step, the MAF picks up on that and the PCM adds fuel. now more air and more fuel will raise the idle speed a bit, so the PCM likely ran into one of the SAM(stay-alive-memory(battery backup)) limits on the IAC, so it has to retard spark at idle to get it stable and at it'* target speed.

it will eventually fix itself, but starting fresh is always a good idea when dealing with PCM commanded/read sensors and actuators.
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Old 07-30-2010, 03:33 PM   #20
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it seems to have worked thanks for the help i really like my Bonnie and would hate to be without it any longer than i had to be
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