92 Camaro RS. Very high idle - CamaroZ28.Com Message Board


Reply
 
Thread Tools Search this Thread
Old 05-27-2012, 12:53 PM   #1
Registered User
Thread Starter
 
Join Date: Feb 2005
Location: California
Posts: 5
92 Camaro RS. Very high idle

Hello to all:
My cousin bought above mentioned car and it has a very high idle 1500-2000 rpms.
Now, I have pulled a "51 code" prom error.
I cleaned the IAC. there is a high vacuum coming from the port that is located in TBI. When I put my finger in the hole, the idle drops nicely.
My concern is if it is the IAC or Computer itself. The light would flash like a "strobe light" when he first got it. After using the paperclip method to pull codes and pulling fuse, the ses light is steady lit.
Motor runs fine off idle.
ANY suggestions as to where the problem lies?
Thank you in advance!
Blessings
csbjr is offline   Reply With Quote
Old 05-27-2012, 02:37 PM   #2
Registered User
Thread Starter
 
Join Date: Feb 2005
Location: California
Posts: 5
Re: 92 Camaro RS. Very high idle

I checked voltage at iac connector A/b and c/d . No voltage present, so I blocked IAC passage with a towel for now to bring idle down. Car runs great other than the idle problem that was there.
Also, i tried moving plunger by applying 12 volts to a/b and c/d terminals, i felt a lil movement, but the plunger never moved in nor out.
Blessings

Last edited by csbjr; 05-27-2012 at 02:38 PM. Reason: additional info
csbjr is offline   Reply With Quote
Old 05-27-2012, 05:48 PM   #3
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 45,318
Re: 92 Camaro RS. Very high idle

Test the IAC by measuring the resistance of the coils. There won't be any "voltage" at the pins unless the ECM is telling the valve to move open or closed. It's a "stepper" motor..... the ECM sets the 'counts' and valve moves one step at a time.

This is for a 4th Gen, but may be applicable to your 92:

http://shbox.com/1/iac2.jpg
Injuneer is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
speed cluster sdn1997rs Parts For Sale 0 12-30-2014 08:30 AM
Camaro Podcast #484 - Z/28 vs Mustang vs Hellcat ChrisFrez CamaroZ28.Com Podcast 1 12-15-2014 03:09 PM
New! Total Blackout (or colors/CF) Decal Kit for 2010-13 Camaro @PFYC-PartsForYourCar PFYC Supporting Vendor Group Purchases and Sales 0 12-04-2014 11:56 AM
WTB: K&N Cold Air Intake bee20e Parts Wanted 2 11-27-2014 05:20 PM
Hesitation off idle IRABuss LT1 Based Engine Tech 445 09-07-2011 09:08 PM


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 -5. The time now is 07:25 AM.


Copyright © 1996-2017 CamaroZ28.com. All rights reserved.