iac question /again
Thread Starter
Racer
Joined: Feb 1999
Posts: 394
Likes: 0
From: Amberg, Germany
iac question /again
i cleaned the iac and did a reset. the car idles perfect, but after i drive and stop the first time, it idles to low. it seems that the iac relearns wrong ?
frank :confused:
frank :confused:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: iac question /again (eamador11)
I tend to agree; assuming the connections are good and the bore is clean the unit should be replaced.
First check that you have no vacuum leaks.
First check that you have no vacuum leaks.
Burning Brakes
Joined: Dec 2001
Posts: 901
Likes: 15
From: Punta Gorda, FL
Re: iac question /again (Frank92)
I would be suspicious of tb issues (worn shaft). However, if you want to try another IAC, I'll sell you a used one I know is working properly if you can't get one over there (off my '95, I think it's the same). lspalding@ameritech.net
Race Director
Joined: Feb 2001
Posts: 13,910
Likes: 101
From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
Re: iac question /again (lspalding)
I started to get the IAC code when I use the AC and stop at a light. the RPMs drop to 500 or below, and bang light comes on. How hard is it to replace the IAC?
Thread Starter
Racer
Joined: Feb 1999
Posts: 394
Likes: 0
From: Amberg, Germany
Re: iac question /again (Bluewasp)
thanks for response. i already have a new (1/2 y.o.) iac valve. i cleaned the intake yesterday but no change.
i remeber taht i took off the thin vacuum lines (under left cover) to reach the oil presuure switch (i changed the switch). from this moment she had the symtoms (rough idle). maybe i bent the map a litlle bit, so that maybe the small thing that goes into the left engine side is not sitting right in the middle (and stuck).
i´ll check these vacuum related things today and see what happens.
thanks frank
p.s. i hope i can visit the "great 50 years corvette meet" tomorrow in munich (germany)
i remeber taht i took off the thin vacuum lines (under left cover) to reach the oil presuure switch (i changed the switch). from this moment she had the symtoms (rough idle). maybe i bent the map a litlle bit, so that maybe the small thing that goes into the left engine side is not sitting right in the middle (and stuck).
i´ll check these vacuum related things today and see what happens.
thanks frank
p.s. i hope i can visit the "great 50 years corvette meet" tomorrow in munich (germany)
Le Mans Master
Joined: Nov 2002
Posts: 7,080
Likes: 0
From: Corvette valley Georgia
St. Jude Donor '06
Re: iac question /again (Bluewasp)
I started to get the IAC code when I use the AC and stop at a light. the RPMs drop to 500 or below, and bang light comes on. How hard is it to replace the IAC?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: iac question /again (Bluewasp)
Bluewasp, to change the IAC you just:
-unplug the cable & unscrew the IAC
-clean the pintel bore with carb cleaner
-install the new IAC & plug in the cable
-set base idle, per method on my site
-unplug the cable & unscrew the IAC
-clean the pintel bore with carb cleaner
-install the new IAC & plug in the cable
-set base idle, per method on my site
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: iac question /again (Frank92)
i cleaned the iac and did a reset. the car idles perfect, but after i drive and stop the first time, it idles to low. it seems that the iac relearns wrong ?
frank :confused:
frank :confused:
The IAC doesn't learn anything. Its just set wrong.
Search through the archieves on IAC and my user name you will find a few of the articles I wrote that explain the idle problems that people have. Its way to much to retype.
That is why I wish we had sticky posts. hint hint.
