CorvetteForum - Chevrolet Corvette Forum Discussion

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

High idle

Thread Tools
 
Search this Thread
 
Old Aug 22, 2016 | 08:35 PM
Share
  #1  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default High idle
Driving the car tonight and went to pass a car so I had to step on it. Once I let off the gas the idle will not go down. I put it in park and its idling at 3 grand. While in gear it's idling at 2 grand. Anyone know why? How can I fix this?

Thanks.
Reply
0
Old Aug 22, 2016 | 08:42 PM
Share
  #2  
antfarmer2's Avatar
antfarmer2
Race Director
 
Joined: Mar 2015
Posts: 15,926
Likes: 579
Default
Sticky throttle body or cable clean and lube. Maybe a vacumm line. Or even your floor mat stuck on the pedal.
Last edited by antfarmer2; Aug 22, 2016 at 08:44 PM.
Reply
0
Old Aug 22, 2016 | 10:12 PM
Share
  #3  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Originally Posted by antfarmer2
Sticky throttle body or cable clean and lube. Maybe a vacumm line. Or even your floor mat stuck on the pedal.
Ok. I'll check the cable. What's the easiest way to clean the throttle body if it is that?

Thanks.
Reply
0
Old Aug 22, 2016 | 11:08 PM
Share
  #4  
ex-x-fire's Avatar
ex-x-fire
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2009
Posts: 2,236
Likes: 286
Default
Might have a big vacuum leak or a bum coolant temp sensor. Make sure the cruise control servo isn't hanging it up.
Reply
1
Old Aug 22, 2016 | 11:14 PM
Share
  #5  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Originally Posted by ex-x-fire
Might have a big vacuum leak or a bum coolant temp sensor. Make sure the cruise control servo isn't hanging it up.
Ok I'll look into that as well. All I did was get on it as I was passing a car and now it seems stuck.
Reply
0
Old Aug 23, 2016 | 12:17 AM
Share
  #6  
antfarmer2's Avatar
antfarmer2
Race Director
 
Joined: Mar 2015
Posts: 15,926
Likes: 579
Default
Originally Posted by James84vette
Ok I'll look into that as well. All I did was get on it as I was passing a car and now it seems stuck.
Open the hood and hand work the throttle and see might just be the cable flipped off.
Reply
1
Old Aug 23, 2016 | 02:40 AM
Share
  #7  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default
Mine got hung up on the clamp that holds the flexible air coupling to the throttle body. I put the screw on the opposite side and problem solved.
Reply
1
Old Aug 23, 2016 | 08:47 AM
Share
  #8  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Thanks for all the responses.
Reply
0
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

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

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

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

 Michael S. Palmer
story-7

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

 Joe Kucinski
story-8

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

 Joe Kucinski
story-9

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

 Verdad Gallardo
Old Aug 23, 2016 | 06:58 PM
Share
  #9  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Originally Posted by antfarmer2
Open the hood and hand work the throttle and see might just be the cable flipped off.
Popped the hood and pulled the cable a bit and it was fine again. Must have got caught last night when I got in it.
Reply
0
Old Aug 23, 2016 | 07:02 PM
Share
  #10  
antfarmer2's Avatar
antfarmer2
Race Director
 
Joined: Mar 2015
Posts: 15,926
Likes: 579
Default
Originally Posted by James84vette
Popped the hood and pulled the cable a bit and it was fine again. Must have got caught last night when I got in it.
good job just how I like it cheap and easy.
Reply
0
Old Aug 23, 2016 | 08:00 PM
Share
  #11  
ex-x-fire's Avatar
ex-x-fire
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2009
Posts: 2,236
Likes: 286
Default
I'd take a closer look, you don't want a runaway. You don't want to treat this like a toilet that's always running & you just jiggle the handle to fix it.
Last edited by ex-x-fire; Aug 23, 2016 at 08:03 PM.
Reply
0
Old Aug 23, 2016 | 08:07 PM
Share
  #12  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Originally Posted by antfarmer2
good job just how I like it cheap and easy.
Lol
Reply
0
Old Aug 23, 2016 | 08:09 PM
Share
  #13  
James84vette's Avatar
James84vette
Thread Starter
Instructor
 
Joined: Mar 2016
Posts: 171
Likes: 6
From: SW Ontario
Default
Originally Posted by ex-x-fire
I'd take a closer look, you don't want a runaway. You don't want to treat this like a toilet that's always running & you just jiggle the handle to fix it.
Good point. The cable always seems a bit sticky when I get on it. I plan on taking it apart and cleaning. Bought some throttle body cleaner today and will do that as well.

Also doing the intake this winter so I'll have it all apart then.
Reply
0

Get notified of new replies

To High idle

Back to Subforum
C4 Tech/Performance
View Next Unread
Engine stumbling




Click for Advanced Search
Reply Closed Thread Share
Forum Jump
Trending Topics

All times are GMT -4. The time now is 05:48 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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