C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Idle Adjustment Screw

Thread Tools
 
Search this Thread
 
Old Aug 9, 2011 | 08:08 AM
  #1  
AstroMan1's Avatar
AstroMan1
Thread Starter
Instructor
10 Year Member
 
Joined: Feb 2009
Posts: 233
Likes: 1
From: Parkersburg WV
Default Idle Adjustment Screw

What do you use to seal the idle adjustment screw?
Thanks!
Reply
Old Aug 9, 2011 | 08:10 AM
  #2  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,306
Likes: 242
From: Summerland B.C. Canada
Default

No need to seal it.
Reply
Old Aug 9, 2011 | 10:11 AM
  #3  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

After the factory adjustment I think they seal it to put off the casual mechanic so you will take it to the dealer.

Just curious, did you adjust the idle screw for some reason? Folks think they are doing the right thing by adjusting the idle at the screw but there are other things that may be the reason for low or high idle. You need to check your TPS, the IAC and check for vacuum leaks.
Reply
Old Aug 10, 2011 | 04:14 AM
  #4  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

I recently adjusted mine for the first time in 25 years because I had idle problems (dying at idle). I think the linkage bends over time from the spring tension. Also, it looked to me like the end of the adjusting screw was kinda mashed.
Reply
Old Aug 10, 2011 | 04:54 AM
  #5  
Joe C's Avatar
Joe C
Race Director
25 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2000
Posts: 11,470
Likes: 764
Default

Originally Posted by AGENT 86
No need to seal it.
Reply
Old Aug 10, 2011 | 08:04 AM
  #6  
AstroMan1's Avatar
AstroMan1
Thread Starter
Instructor
10 Year Member
 
Joined: Feb 2009
Posts: 233
Likes: 1
From: Parkersburg WV
Default

I got a Renegade and didn't like how the idle was adjusted when I got the car back. It seems like the screw is pretty loose and would turn unless I did something.
Reply
Old Aug 10, 2011 | 08:32 AM
  #7  
WW7's Avatar
WW7
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Default

Originally Posted by AstroMan1
I got a Renegade and didn't like how the idle was adjusted when I got the car back. It seems like the screw is pretty loose and would turn unless I did something.
I know what your saying , mine was pretty loose also when I adjusted it after putting in my 383 engine..It probably would have never moved, but to make sure I just put a drop of a low strength silicone sealer on the threads when I was done with the idle adjustment procedure. For your engine to run properly you can't just set the idle screw, you have to use the adjustment procedure outlined in the FSM. As soon as you turn that screw you also change your TPS setting which has to be reset... I believe there's also a copy of this procedure on this forum somewhere..........WW

Here you go, I found it for you...

https://www.corvetteforum.com/techti...D=55&TopicID=2

Last edited by WW7; Aug 10, 2011 at 08:43 AM.
Reply
Old Aug 10, 2011 | 12:38 PM
  #8  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,431
Likes: 3,284
From: Hartford WI
Default

That procedure is only good IF you are dealing with a stock car. When you change the command idle or other parameters, I don't think that procedure works well
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-1

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-2

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-3

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-4

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-5

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-6

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-7

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-8

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-9

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
Old Aug 10, 2011 | 06:19 PM
  #9  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

I would still check the TPS and IAC. When was the last time the throttle body was serviced? Could be idle air passageways are clogged.
Reply

Get notified of new replies

To Idle Adjustment Screw





All times are GMT -4. The time now is 12:06 AM.

story-0
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-1
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-2
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-5
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE