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

Idle issues

Thread Tools
 
Search this Thread
 
Old May 22, 2009 | 12:57 PM
  #1  
Hanny93's Avatar
Hanny93
Thread Starter
Intermediate
 
Joined: Oct 2004
Posts: 35
Likes: 0
From: LaCrosse wi
Default Idle issues

I have a 93 auto, no mods. The idle has started to fluctuate after I have driven the car a while, 20- 30 min. No engine light, I have not checked for codes. The car runs great, no change in milage or anything.
Any ideas? Thanks for the help.
Reply
Old May 22, 2009 | 01:56 PM
  #2  
Hanny93's Avatar
Hanny93
Thread Starter
Intermediate
 
Joined: Oct 2004
Posts: 35
Likes: 0
From: LaCrosse wi
Default opti

From some of the reading I have been doing this looks like it could be opti related. Has anyone used the opti sold by summit?
Reply
Old May 23, 2009 | 10:09 AM
  #3  
josephf31's Avatar
josephf31
Pro
10 Year Member
 
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
Default Very

Originally Posted by Hanny93
I have a 93 auto, no mods. The idle has started to fluctuate after I have driven the car a while, 20- 30 min. No engine light, I have not checked for codes. The car runs great, no change in milage or anything.
Any ideas? Thanks for the help.
likely the injectors are bad, run an ohm test (many articles on the subject if you do a search)
Reply
Old May 23, 2009 | 10:21 AM
  #4  
engle1147's Avatar
engle1147
Le Mans Master
Supporting Lifetime
 
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Default

Could be a bunch of things.....you should check for codes first. Most autoparts stores will do this for free.

A basic tune up might do some good if she's been neglected. Things such as filters, cleaning the carbon off inside the throttle body (use throttle body cleaner) and idle air control pintle and check or you could be a plug problem (check gap and burn)....other things to consider:

Could be dirty sensors
Could be clogging cats
As mentioned above it could be an opti spark related issue

Good luck
Reply

Get notified of new replies

To Idle issues





All times are GMT -4. The time now is 11:10 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE