IAC counts 0, no change in performance? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 11-07-2004, 09:23 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default IAC counts 0, no change in performance?

I put a brand new IAC in today and when I fired up the car the IAC counts were 0!!!

When I got on it down the road they rose to about 63, but this is nothing compared to what they should be. However the car pulled just as strong she did before and I got 0 KR all the way through 2nd gear. Does the PCM need the relearn the new IAC? I'm letting the PCM reset itself for a longer period of time as I type this so maybe that will help, otherwise I wonder if its the incorrect IAC. I doubt that though because I checked the P/N with multiple sources and they all matched up. Any other prep I'm supposed to do to the IAC? I just took the spring compressor off that was holding the spring compressed and in place, I don't need to do anything else do I?
Allmachtige is offline   Reply With Quote
Old 11-07-2004, 10:40 PM   #2
Senior Member
Posts like a Corvette
 
Join Date: Jan 2004
Location: Montréal, QC
Posts: 1,374
Thanks: 0
Thanked 0 Times in 0 Posts
Foghorn is on a distinguished road
Default

The IAC valve may be damaged if installed with the cone (pintle) extended more than 28 mm (1-1/8 in). Measure the distance that the valve is extended before installing a new valve. The distance from the idle air control valve motor housing to the end of the idle air control valve pintle should be less than 28 mm (1-1/8 in). Manually compress the pintle until the extension is less than 28 mm (1-1/8 in).

Cheers,
Foghorn is offline   Reply With Quote
Old 11-07-2004, 11:40 PM   #3
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default

Interesting Foghorn, but the pintle on this new IAC is compressed more than the original. In other words, the extended distance between the housing and the pintle is visually less on the new one.
Allmachtige is offline   Reply With Quote
Old 11-08-2004, 12:29 AM   #4
Senior Member
True Car Nut
Thread Starter
 
Join Date: Oct 2002
Location: Genoa, Illinois
Posts: 4,013
Thanks: 0
Thanked 0 Times in 0 Posts
Allmachtige is on a distinguished road
Default

Wait nevermind. After letting the PCM reset for 2 hours and reconnecting the battery it seems to be getting much better numbers: 49-51 counts at idle. So all along I just needed to unhook the battery for longer than 15 minutes.
Allmachtige is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
O2 Crossover Counts azu General GM Chat 4 08-18-2007 01:27 PM
4 Deg KR, 2 Knock Counts BonneMeMN Performance, Brainstorming & Tuning 1 04-01-2007 01:22 PM
How many O2 cross counts is normal? PLANT PROTECTION General GM Chat 0 07-17-2004 11:08 PM
Post counts MOS95B Lounge 60 11-04-2003 12:28 PM
IAC amy_lynn 1992-1999 2 12-18-2002 11:46 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:59 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.