LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cold idle.

Thread Tools
 
Search this Thread
 
Old Jan 26, 2010 | 06:46 PM
  #1  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default Cold idle.

Car is a 93' so it has no MAF.

More and more often recently, when the car is dead cold in the mornings - it has trouble keeping normal idle. it'll drop down to 500 or maybe less and bog a bit unless i manually keep the idle up. Any ideas? O2's are new (ish), however the car is running rich (I think i need a new tune for that problem, however its been running rich for a year and the idle problem is new.)

thanks gentlemen
Reply
Old Jan 26, 2010 | 09:45 PM
  #2  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default

bumpity umpity
Reply
Old Jan 27, 2010 | 03:37 PM
  #3  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default

buuuuuuuuuuuuuuump
Reply
Old Jan 28, 2010 | 06:54 AM
  #4  
sleeperLT1Z28's Avatar
Staging Lane
iTrader: (1)
 
Joined: Jan 2010
Posts: 78
Likes: 1
From: Richmond, VA
Default

I am having the same issue with my '93. After the car warms up for a while, it starts just fine. It almost seems like the IAC is sticky or slow when it's dead cold. Anyone else have this problem?
Reply
Old Jan 28, 2010 | 09:27 AM
  #5  
bigwill12187's Avatar
Teching In
 
Joined: Sep 2009
Posts: 29
Likes: 0
Default

I have the same problem when my car is cold too I have to keep my foot on the gas for a little till it idles normal. I think its the tune that I have, It also is running rich. I bought the car like that. Once I'm done with some things that I'm fixing on the car I well be taking the car to slow hawk for a new tune. i hope that fixes the problem. will seee
Reply
Old Jan 28, 2010 | 05:00 PM
  #6  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default

Yeah i was thinking IAC, but wouldnt it do it all the time if that was the case?
Reply
Old Jan 28, 2010 | 05:04 PM
  #7  
97camaross's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Jul 2008
Posts: 516
Likes: 0
From: pearland texas
Default

clean your TB and IAC and see if that helps.
Reply
Old Jan 28, 2010 | 05:13 PM
  #8  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default

Originally Posted by 97camaross
clean your TB and IAC and see if that helps.
Cool, will do. IAC is connected to the TB, right?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jan 28, 2010 | 05:16 PM
  #9  
porksoda's Avatar
TECH Addict
iTrader: (39)
 
Joined: May 2005
Posts: 2,458
Likes: 2
From: Clovis, NM
Default

Yes. It is the sensor on the bottom.
Reply
Old Jan 28, 2010 | 05:33 PM
  #10  
nik1703's Avatar
Thread Starter
TECH Resident
15 Year Member
 
Joined: Oct 2008
Posts: 966
Likes: 0
From: Redondo Beach, CA
Default


^^ shbox

got it
Reply
Old Jan 29, 2010 | 06:04 AM
  #11  
sleeperLT1Z28's Avatar
Staging Lane
iTrader: (1)
 
Joined: Jan 2010
Posts: 78
Likes: 1
From: Richmond, VA
Default

Originally Posted by bigwill12187
I have the same problem when my car is cold too I have to keep my foot on the gas for a little till it idles normal. I think its the tune that I have, It also is running rich. I bought the car like that. Once I'm done with some things that I'm fixing on the car I well be taking the car to slow hawk for a new tune. i hope that fixes the problem. will seee
What part of the tune could cause this? The only table I have changed at idle is Closed TPS Spark Advance vs RPM. I raised it to 24 at 400 and 800 RPM and 30 at 1200 RPM. Base timing and fueling are all stock. Has anyone messed with this stuff?
Reply




All times are GMT -5. The time now is 10:49 PM.

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