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

Im confused

Thread Tools
 
Search this Thread
 
Old Jul 29, 2010 | 07:49 PM
  #1  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default Im confused

I was driving last friday and all of a sudden it starts sputtering almost like it was out of gas. Went to pick up some food earlier and it starts doing it again. I drove the car about 3 times after it started and it was fine but it came back all of a sudden. What could it be?
Reply
Old Jul 29, 2010 | 08:23 PM
  #2  
LT1's Avatar
LT1
TECH Fanatic
20 Year Member
Photogenic
iTrader: (1)
 
Joined: Sep 2003
Posts: 1,624
Likes: 4
From: NorCal
Default

Same thing happend to me years ago. It could be the opti spark going bad, check to see if theres coolant or water/moisture leaking on it.
Reply
Old Jul 29, 2010 | 10:25 PM
  #3  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

Originally Posted by LT1
Same thing happend to me years ago. It could be the opti spark going bad, check to see if theres coolant or water/moisture leaking on it.
Nothing on the opti
Reply
Old Jul 29, 2010 | 10:32 PM
  #4  
94fixerTA's Avatar
On The Tree
iTrader: (5)
 
Joined: Jul 2009
Posts: 173
Likes: 0
From: Fort Worth, TX
Default

Tps maybe
Reply
Old Jul 29, 2010 | 11:31 PM
  #5  
Quick94LT1's Avatar
Launching!
iTrader: (4)
 
Joined: Dec 2009
Posts: 205
Likes: 0
From: Southern California
Default

It's the coil, mine did that and new coil fixed it
Reply
Old Jul 29, 2010 | 11:38 PM
  #6  
my1994z28's Avatar
On The Tree
iTrader: (3)
 
Joined: Jul 2009
Posts: 126
Likes: 0
From: michigan
Default

I would check you fuel pressure,icm,coil.
Reply
Old Jul 30, 2010 | 12:24 AM
  #7  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

Originally Posted by my1994z28
I would check you fuel pressure,icm,coil.
I kinda thought it would be the fuel pressure but wasnt sure.
Reply
Old Jul 30, 2010 | 03:01 PM
  #8  
Slowmaro95Z28's Avatar
12 Second Club
 
Joined: Aug 2007
Posts: 387
Likes: 0
From: North Versailles, PA
Default

I would check the fuel filter first. It's only $9 at most part stores so it won't hurt to change anyway. Next I would check the plug wires to see if any are burned or loose on either end. I just had a plug wire come loose from a plug a few weeks ago and the same thing happened. Opti will almost always set off a ses light. Most people say to check the opti but most of the time it's something simple. Good luck.
Reply
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 Aug 1, 2010 | 06:45 PM
  #9  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

could a bad coil also make it hard to crank when it hasnt been cranked in about a week.
Reply
Old Aug 1, 2010 | 08:30 PM
  #10  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

it takes 2 to 3 tries before it will fire up
Reply
Old Aug 3, 2010 | 09:08 PM
  #11  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

ok more info drove it today and it started popping and back firing but stopped when i reved it. help please.

Last edited by lethal bird; Aug 3, 2010 at 09:20 PM.
Reply
Old Aug 3, 2010 | 09:47 PM
  #12  
stevo9389's Avatar
TECH Enthusiast
 
Joined: Mar 2009
Posts: 680
Likes: 8
From: Clearwater
Default

IF you got an CEL/SES light when it happened then its very likely a high/low res failure on the opti.
IF not then check the more obvious and cheaper parts first.
Reply
Old Aug 3, 2010 | 09:53 PM
  #13  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

Originally Posted by stevo9389
IF you got an CEL/SES light when it happened then its very likely a high/low res failure on the opti.
IF not then check the more obvious and cheaper parts first.
it was already on

Last edited by lethal bird; Aug 4, 2010 at 01:52 AM.
Reply
Old Aug 8, 2010 | 12:33 PM
  #14  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

ok im still confused, now it will die about 2 mins after a cold start if i just let it sit.
Reply
Old Aug 8, 2010 | 12:36 PM
  #15  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

and if i rev it and back up and find black sut on the concert slab
Reply
Old Aug 8, 2010 | 01:11 PM
  #16  
stevo9389's Avatar
TECH Enthusiast
 
Joined: Mar 2009
Posts: 680
Likes: 8
From: Clearwater
Default

why are you confused? there was no indication on your part that anything you were suggested to check was actually done other than confirming nothing dripped onto the opti. you mentioned the SES light already being on so go have the codes scanned. if you want help you can either:
1. perform what you were asked to do so far and respond with the results
2. ask someone to go to your house and work on the car because you will not
Reply
Old Aug 8, 2010 | 08:18 PM
  #17  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

Originally Posted by stevo9389
why are you confused? there was no indication on your part that anything you were suggested to check was actually done other than confirming nothing dripped onto the opti. you mentioned the SES light already being on so go have the codes scanned. if you want help you can either:
1. perform what you were asked to do so far and respond with the results
2. ask someone to go to your house and work on the car because you will not
Ok I did everything i know to do. I cant take it to be scanned because it will not run for no more thank 2 to 3 minutes without dying on me and the nearest place to get it scanned is about 45 minutes away. Im giving what i know. There is no need what so ever to try and be an ***. When you have limited tools, and knowledge, its not that easy. Thats why i come here looking for advice because bills and college take almost every bit of my funds. Im giving the information as to what is happening when it happens hoping someone has had the problem and can tell what they did to fix it. the only reason I ask these questions are to try and narrow down what it is, Im a full time college student and part get expensive really quick.
Reply
Old Aug 10, 2010 | 08:24 PM
  #18  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

ok its not the coil or the ICM. What about the O2's can it make the car die on me and backfire.
Reply
Old Aug 10, 2010 | 08:58 PM
  #19  
LT1's Avatar
LT1
TECH Fanatic
20 Year Member
Photogenic
iTrader: (1)
 
Joined: Sep 2003
Posts: 1,624
Likes: 4
From: NorCal
Default

Bad O2 sensor wont give you the problem your describing.

Have you tried unplugging your MAF sensor to see if it runs better?

Last edited by LT1; Aug 10, 2010 at 09:04 PM.
Reply
Old Aug 10, 2010 | 09:08 PM
  #20  
lethal bird's Avatar
Thread Starter
TECH Fanatic
iTrader: (12)
 
Joined: Jul 2009
Posts: 1,826
Likes: 1
From: Dekalb, Ms
Default

Originally Posted by LT1
Bad O2 sensor wont give you the problem your describing.

Have you tried unplugging your MAF sensor to see if it runs better?
just did and it cranked and died in about 5 seconds. with plugged it it runs for about 10 and then dies
Reply




All times are GMT -5. The time now is 09:33 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