Iac adjust
Melting Slicks
Joined: Mar 2008
Posts: 2,351
Likes: 222
From: Delta B.C. Canada
2023 C7 of the Year Finalist - Unmodified
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2015 C4 of Year Finalist
There is no adjustment. Provided that the pintle isn't busted from mis-handling, and it's reset properly, there's nothing else to do.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
GM says to depress the throttle a little, while held that way, start the engine, release pressure on the throttle and let the engine idle 5 seconds. Shut down the engine for 10 seconds the restart the engine normally. Times corrected by me per FSM.
I looked up the times and they're now shown correctly, above.
Jake
I looked up the times and they're now shown correctly, above.
Jake
Last edited by JAKE; Sep 17, 2010 at 09:00 PM. Reason: Correct the times - IDLE for 5 seconds; OFF for 10 seconds
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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Last edited by GREGGPENN; Sep 18, 2010 at 01:17 PM.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
I just checked the link you posted but didn't see the IAC adjusting procedure that I listed earlier. The link you posted is primarily about the TPS. What did I miss?
Jake
Race Director
Joined: Nov 2003
Posts: 12,221
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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My 89 FSM, quotes steps 2 thru 9 (under the "Procedure" section of the post I linked). In my FSM, steps 2-9 are the prelim steps before the IAC reset.
After step 9, the steps you posted, Jake, are to finish the IAC "reset". I guess the real question is whether it's necessary to fully retract the IAC before performing the steps you posted. (That's what steps 2-9 in the linked post accomplishes.)
Last edited by GREGGPENN; Sep 19, 2010 at 02:55 AM.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
I read the linked post a couple of days ago. After re-reading, I realize the info is incomplete.
My 89 FSM, quotes steps 2 thru 9 (under "Procedure" of post #) as the prelim steps before the IAC reset.
After step 9, the steps you posted, Jake, are to finish the IAC "reset". I guess the real question is whether it's necessary to fully retract the IAC before performing the steps you posted. (That's what steps 2-9 in the linked post accomplishes.)
My 89 FSM, quotes steps 2 thru 9 (under "Procedure" of post #) as the prelim steps before the IAC reset.
After step 9, the steps you posted, Jake, are to finish the IAC "reset". I guess the real question is whether it's necessary to fully retract the IAC before performing the steps you posted. (That's what steps 2-9 in the linked post accomplishes.)
I do recall using the jumper method on the 86 Vette I use to own.
Jake
Burning Brakes
Joined: Aug 2010
Posts: 951
Likes: 3
From: Placerville CA
If it was me I'd pull the IAC, disassemble it and inspect the air hole and/or pintle for blockage or a broken pintle spring. Clean the throttle body while you are there. It's a very simple procedure.
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