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

Idle issues

Thread Tools
 
Search this Thread
 
Old Oct 10, 2006 | 04:37 PM
  #1  
honda hunter's Avatar
honda hunter
Thread Starter
Pro
10 Year Member
 
Joined: Feb 2005
Posts: 531
Likes: 0
From: Manama Bahrain
Default Idle issues

I just had my LT1 383 from my Camaro installed into my C4 but it wont idle under 2000 rpm's. What all should I check?
Reply
Old Oct 10, 2006 | 04:39 PM
  #2  
RRT vette's Avatar
RRT vette
Le Mans Master
15 Year Member
 
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Default

TPS voltage, IAC counts, and vac leaks for now...other will help.
Reply
Old Oct 10, 2006 | 06:27 PM
  #3  
Alvin's Avatar
Alvin
Drifting
 
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Default

Originally Posted by honda hunter
I just had my LT1 383 from my Camaro installed into my C4 but it wont idle under 2000 rpm's. What all should I check?

Sounds like a bad install on the prom or a really bad vaccum leak.
Reply
Old Oct 11, 2006 | 10:13 AM
  #4  
honda hunter's Avatar
honda hunter
Thread Starter
Pro
10 Year Member
 
Joined: Feb 2005
Posts: 531
Likes: 0
From: Manama Bahrain
Default

Originally Posted by Alvin
Sounds like a bad install on the prom or a really bad vaccum leak.
Today we discovered that when we replace the 37lbs injectors with the stock injectors the car idles a ton better. We think it may be in the tune? Could you check for me and see if they were set for 37's?
Reply
Old Oct 11, 2006 | 11:25 AM
  #5  
Casethecorvetteman's Avatar
Casethecorvetteman
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Default

What year model is the engine and what ECM are you using?
Reply
Old Oct 11, 2006 | 03:16 PM
  #6  
honda hunter's Avatar
honda hunter
Thread Starter
Pro
10 Year Member
 
Joined: Feb 2005
Posts: 531
Likes: 0
From: Manama Bahrain
Default

Originally Posted by Casethecorvetteman
What year model is the engine and what ECM are you using?
The engine was used in a 94 but it's a 4 bolt main, vented opti motor. I'm using the 1993 computer with a chip from Alvin.
Reply
Old Oct 11, 2006 | 04:42 PM
  #7  
Cold_B's Avatar
Cold_B
Drifting
 
Joined: Mar 2004
Posts: 1,522
Likes: 0
Default

Originally Posted by honda hunter
Today we discovered that when we replace the 37lbs injectors with the stock injectors the car idles a ton better. We think it may be in the tune? Could you check for me and see if they were set for 37's?

Those sound awfully big for a 383. It is super/turbochargered or have nitrous?

Is the computer programmed for 37's?
Reply
Old Oct 11, 2006 | 05:14 PM
  #8  
Casethecorvetteman's Avatar
Casethecorvetteman
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Default

Originally Posted by honda hunter
The engine was used in a 94 but it's a 4 bolt main, vented opti motor. I'm using the 1993 computer with a chip from Alvin.
No worries What does it run like with the stock tune on it? What is the fuel pressure set at?
Originally Posted by Cold_B
Those sound awfully big for a 383. It is super/turbochargered or have nitrous?

Is the computer programmed for 37's?
I think he is waiting to find out that bit of info from Alvin. If it is set for the right size in the tune then it wont really matter what size is used as long as its big enough to flow enough fuel. The computer will calculate how long each injector has to squirt for the required amount of fuel based on the size set in the tune.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Oct 11, 2006 | 10:31 PM
  #9  
honda hunter's Avatar
honda hunter
Thread Starter
Pro
10 Year Member
 
Joined: Feb 2005
Posts: 531
Likes: 0
From: Manama Bahrain
Default

Originally Posted by Casethecorvetteman
No worries What does it run like with the stock tune on it? What is the fuel pressure set at?

I think he is waiting to find out that bit of info from Alvin. If it is set for the right size in the tune then it wont really matter what size is used as long as its big enough to flow enough fuel. The computer will calculate how long each injector has to squirt for the required amount of fuel based on the size set in the tune.
Ill try the stock tune and see how it works out. Just my luck it would be a problem with the tune after it took forever to get.
Reply
Old Oct 11, 2006 | 11:22 PM
  #10  
Casethecorvetteman's Avatar
Casethecorvetteman
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Default

Originally Posted by honda hunter
Ill try the stock tune and see how it works out. Just my luck it would be a problem with the tune after it took forever to get.
Its worth a shot mate
Reply

Get notified of new replies

To Idle issues





All times are GMT -4. The time now is 11:47 PM.

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