LS1TECH - Camaro and Firebird Forum Discussion

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

Quick Question

Thread Tools
 
Search this Thread
 
Old Feb 18, 2011 | 12:24 PM
Share
  #1  
eNoHtoannn's Avatar
eNoHtoannn
Thread Starter
Registered User
 
Joined: Dec 2010
Posts: 13
Likes: 0
Default Quick Question
when im cruisin on the bridge or highway at like 75-90, and let off the gas. my car backfires. i have a tuned PCM but would getting a dyno tune fix this problem or would it be someting else?
Reply
0
Old Feb 18, 2011 | 01:37 PM
Share
  #2  
MasterTomos's Avatar
MasterTomos
TECH Junkie
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (15)
 
Joined: Oct 2008
Posts: 3,509
Likes: 4
From: Midwest
Default
Do you have cats? Removal of catalytic converters cause this sometimes.
Reply
0
Old Feb 18, 2011 | 04:16 PM
Share
  #3  
RamAir95TA's Avatar
RamAir95TA
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default
Any mods? Year? Etc.? More details.
Reply
0
Old Feb 18, 2011 | 05:50 PM
Share
  #4  
LSWHO's Avatar
LSWHO
TECH Addict
iTrader: (1)
 
Joined: Mar 2008
Posts: 2,350
Likes: 0
Default
Did you have it tuned recently? DFCO values could be skewed slightly and causing you to go in and out of DFCO causing backfires or popping.
Reply
0
Old Feb 18, 2011 | 06:33 PM
Share
  #5  
eNoHtoannn's Avatar
eNoHtoannn
Thread Starter
Registered User
 
Joined: Dec 2010
Posts: 13
Likes: 0
Default
MasterT- nah i have gutted cats
RamAir- 93. lt4 hotcam, gutted cats, 3" cutout, shorties,fastchip PCM tune
Lswho- just a mailorder tune.
Reply
0
Old Feb 18, 2011 | 06:57 PM
Share
  #6  
LSWHO's Avatar
LSWHO
TECH Addict
iTrader: (1)
 
Joined: Mar 2008
Posts: 2,350
Likes: 0
Default
Originally Posted by eNoHtoannn
MasterT- nah i have gutted cats
RamAir- 93. lt4 hotcam, gutted cats, 3" cutout, shorties,fastchip PCM tune
Lswho- just a mailorder tune.
Did you have it tuned recently? In other words did it start after your tune?
Reply
0
Old Feb 20, 2011 | 10:06 AM
Share
  #7  
eNoHtoannn's Avatar
eNoHtoannn
Thread Starter
Registered User
 
Joined: Dec 2010
Posts: 13
Likes: 0
Default
I bought the car like that...but was never really in the mood to push it. I did forget to mention that i can smell gas outside the car, standing behind my car.
Reply
0

Trending Topics

Old Feb 20, 2011 | 12:13 PM
Share
  #8  
jaycenk's Avatar
jaycenk
TECH Addict
iTrader: (1)
 
Joined: Jun 2009
Posts: 2,210
Likes: 1
From: Holiday, FL
Default
Answer onr question for us. DO you have cats on the car?
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Brett Foote
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

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

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Feb 20, 2011 | 02:07 PM
Share
  #9  
MasterTomos's Avatar
MasterTomos
TECH Junkie
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (15)
 
Joined: Oct 2008
Posts: 3,509
Likes: 4
From: Midwest
Default
Originally Posted by jaycenk
Answer onr question for us. DO you have cats on the car?
Originally Posted by eNoHtoannn
MasterT- nah i have gutted catsRamAir- 93. lt4 hotcam, gutted cats, 3" cutout, shorties,fastchip PCM tune
Lswho- just a mailorder tune.
The tune has to be off if it smells like gas, probably running too rich. I'd send the PCM into pcmforless or Madtuner and have them redo it.
Reply
0
Old Feb 20, 2011 | 02:15 PM
Share
  #10  
LSWHO's Avatar
LSWHO
TECH Addict
iTrader: (1)
 
Joined: Mar 2008
Posts: 2,350
Likes: 0
Default
Originally Posted by MasterTomos
The tune has to be off if it smells like gas, probably running too rich. I'd send the PCM into pcmforless or Madtuner and have them redo it.
Or he can have a leak and be "lean" and the PCM is flooding it trying to fix it.
Reply
0
Old Feb 21, 2011 | 10:54 AM
Share
  #11  
eNoHtoannn's Avatar
eNoHtoannn
Thread Starter
Registered User
 
Joined: Dec 2010
Posts: 13
Likes: 0
Default
hey just yesterday i drove my car for about 20 miles..when i got to my friends house, i turned the corner and the car started to either backfire or make a popping noise almost every 4-5 seconds as i press on the gas. (sounds like...pop.....pop....pop pop....pop) this just started yesterday night.


just went under the hood and seen this hose and took a picture...
hose looks like it next to the opti.


Last edited by eNoHtoannn; Feb 21, 2011 at 11:18 AM.
Reply
0
Old Feb 21, 2011 | 12:04 PM
Share
  #12  
ZFreie's Avatar
ZFreie
TECH Enthusiast
 
Joined: Aug 2010
Posts: 543
Likes: 0
From: New Hampshire
Default
Looks like a vacuum line? Or might be the vent for the opti? Hard to tell with the pic.

Edit-Cant be opti vent can it? 93s didn't have vented optis?
Reply
0
Tags
Back to Subforum
LT1-LT4 Modifications
View Next Unread
fuel lines




Advanced Search

All times are GMT -5. The time now is 05:07 PM.

story-0
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-1
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 | 2026-05-28 11:05:11


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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