LS1TECH - Camaro and Firebird Forum Discussion

PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Lots of backfiring at idle....why??

Thread Tools
 
Search this Thread
 
Old May 29, 2003 | 12:50 AM
Share
  #1  
quickWS6's Avatar
quickWS6
Thread Starter
TECH Addict
 
Joined: Dec 2001
Posts: 2,337
Likes: 0
From: Auburn, AL
Default Lots of backfiring at idle....why??
I get backfiring at idle and my Ltrims on bank 1 are -3%, on bank 2 they are 25% at idle. Why is this? I have leaned out the car some and I still get it. Any clues?
Reply
0
Old May 29, 2003 | 06:56 AM
Share
  #2  
quickWS6's Avatar
quickWS6
Thread Starter
TECH Addict
 
Joined: Dec 2001
Posts: 2,337
Likes: 0
From: Auburn, AL
Default Re: Lots of backfiring at idle....why??
I'm guessing it is either an exhaust leak or my intake isn't sealed properly. THat sound right?
Reply
0
Old May 29, 2003 | 08:05 AM
Share
  #3  
Viper's Avatar
Viper
12 Second Club
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (6)
 
Joined: Dec 2001
Posts: 4,909
Likes: 3
From: Cleveland, OH
Default Re: Lots of backfiring at idle....why??
Mine did that when I blew the header gasket. FWIW
Reply
0
Old May 29, 2003 | 08:46 AM
Share
  #4  
killer01ws6's Avatar
killer01ws6
TECH Resident
 
Joined: Mar 2003
Posts: 770
Likes: 0
From: Troy Al
Default Re: Lots of backfiring at idle....why??
I'm guessing it is either an exhaust leak or my intake isn't sealed properly. THat sound right?
could be, is this all the time or just when cold. throwing any codes?
Reply
0
Old May 29, 2003 | 11:35 AM
Share
  #5  
jyeager's Avatar
jyeager
TECH Regular
 
Joined: Feb 2003
Posts: 451
Likes: 0
From: Spring Hill, TN
Default Re: Lots of backfiring at idle....why??
Could these symptoms be caused by a misfire on that side?
Reply
0
Old May 29, 2003 | 12:27 PM
Share
  #6  
quickWS6's Avatar
quickWS6
Thread Starter
TECH Addict
 
Joined: Dec 2001
Posts: 2,337
Likes: 0
From: Auburn, AL
Default Re: Lots of backfiring at idle....why??
Its not throwing any codes or any excessive misfires. I'll check the header gaskets.
Reply
0
Old May 29, 2003 | 03:11 PM
Share
  #7  
Reboot's Avatar
Reboot
9 Second Club
iTrader: (5)
 
Joined: Jan 2002
Posts: 651
Likes: 0
From: Sacramento
Default Re: Lots of backfiring at idle....why??
Do you have the coil pack harness reversed?
Reply
0

Trending Topics

Old May 29, 2003 | 04:20 PM
Share
  #8  
quickWS6's Avatar
quickWS6
Thread Starter
TECH Addict
 
Joined: Dec 2001
Posts: 2,337
Likes: 0
From: Auburn, AL
Default Re: Lots of backfiring at idle....why??
Do you have the coil pack harness reversed?
No, I did have them reversed at one time, but that has been fixed. It doesn't pop like the coils are reversed, these are actual backfires and they aren't constant. I can rev it up to 2000 and it does fine. It backfires up high and at idle.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

 Michael S. Palmer
story-1

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-2

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-3

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-4

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-5

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

 Verdad Gallardo
story-6

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

 Pouria Savadkouei
story-7

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

 Verdad Gallardo
story-8

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-9

Top 10 Most Powerful Chevy Trucks Ever Made!

 
Tags
Back to Subforum
PCM Diagnostics & Tuning
View Next Unread
turning off rear o2




Advanced Search

All times are GMT -5. The time now is 07:27 PM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


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