Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Sudden High Idle

Thread Tools
 
Search this Thread
 
Old Feb 14, 2012 | 01:09 PM
  #1  
Nowhereman's Avatar
Thread Starter
Launching!
 
Joined: Dec 2009
Posts: 273
Likes: 0
From: California
Default Sudden High Idle

I've read all the stuff here on high idle rpm.
I checked every vacuum line I can find, even the PCV.
No vacuum leaks, no throttle binding.
I disconnected the battery but that didn't work.
Anymore ideas before I take her into the shop?
Cleaned the MAF and TB with no luck.
Reply
Old Feb 14, 2012 | 02:23 PM
  #2  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

Check the Idle Air Control (IAC) Valve, also try a TPS relearn.

Last edited by 99Bluz28; Feb 14, 2012 at 02:35 PM.
Reply
Old Feb 15, 2012 | 08:22 PM
  #3  
Nowhereman's Avatar
Thread Starter
Launching!
 
Joined: Dec 2009
Posts: 273
Likes: 0
From: California
Default

It is a failed IAC.
$200.00 bucks they want for a new unit.
Reply
Old Feb 15, 2012 | 08:55 PM
  #4  
garygnu's Avatar
TECH Senior Member
 
Joined: Feb 2009
Posts: 5,445
Likes: 4
Default

try cleaning the IAC and see if it works .any codes ?you can probably find a IAC solenoid on here for cheap.I feel a IAC shouldn't cost $200.
Reply
Old Feb 15, 2012 | 08:59 PM
  #5  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

FYI, RockAuto has the ACDELCO IAC, Part # 17113391 for $90 .
Reply
Old Feb 15, 2012 | 10:59 PM
  #6  
Nowhereman's Avatar
Thread Starter
Launching!
 
Joined: Dec 2009
Posts: 273
Likes: 0
From: California
Default

The IAC just came apart in pieces when removed.
I will replace the TPS also.
I shouldn't be too upset as it is a 12 year old car and the very first component failure with the exception of those Damn window motors and one headlight motor.
Still, I love this car and plan on keeping her around.
Reply
Old Feb 18, 2012 | 09:56 AM
  #7  
Nowhereman's Avatar
Thread Starter
Launching!
 
Joined: Dec 2009
Posts: 273
Likes: 0
From: California
Default

Found the issue...
It was the chip set that went bad that I added.
IAC was a mess but after changing it, the idle did not come down.
So much for aftermarket electronics.
Reply




All times are GMT -5. The time now is 02:10 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE