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

WTF Is my Problem?!?!

Thread Tools
 
Search this Thread
 
Old Aug 20, 2009 | 07:17 PM
  #1  
SoxXpupPeT's Avatar
Thread Starter
TECH Junkie
iTrader: (34)
 
Joined: May 2008
Posts: 3,431
Likes: 1
From: Yonkers, NY
Exclamation WTF Is my Problem?!?!

ok afew weeks ago i noticed that under high rpms for awhile and i give it the gas it would bog down and backfire abit. i thought it was low fuel psi being that i have a tune on my cammed lt1 and a stock 167k mile pump/fuel regulator/ and injectors. so i changed out my fuel pump with a walboro 255 and it Still did the same thing. ok i said, its the FPR. so i changed that out just now and it still does the same thing! im trying to find a fuel pressure guage to hook up to the rail and check it there. the symptoms of it now is very long starts and a rough idle at times. and whenever i get over 3k or so with any kind of gas it bogs down and loses all of its power. i fear its my optispark. is there anyway to check that ? i really need suggestions the cars my D and i cant waste time trying to fix it.
Reply
Old Aug 20, 2009 | 07:27 PM
  #2  
AChotrod's Avatar
11 Second Club
iTrader: (17)
 
Joined: Jul 2008
Posts: 9,896
Likes: 1
From: Chicago area
Default

Rotor could be loose
here is how to check the opti but Im not sure if it will work since the car still runs?
http://shbox.com/1/4th_gen_tech2.html#opti_test
Reply
Old Aug 20, 2009 | 07:48 PM
  #3  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Testing the fuel pressure under load at WOT will eliminate a fuel pressure issue.
It could be anything in your ignition system...plugs/wires/coil/opti.
Any codes?
Reply
Old Aug 20, 2009 | 08:31 PM
  #4  
SoxXpupPeT's Avatar
Thread Starter
TECH Junkie
iTrader: (34)
 
Joined: May 2008
Posts: 3,431
Likes: 1
From: Yonkers, NY
Default

i cant even get the car to WOT it completely ***** up. i dont have a scanner nor knows anyone with one. im going to say its ignition related because my friend had reminded me about arcing and sure enough. i have afew wires that are arcing! not alot but enough to see it. that and my accel coil is doing abit of a light show. i feel so stupid for not checking that sooner. im going to buy msd everything tonight and hopefully have it all set up next week. ill keep it updated
Reply
Old Aug 20, 2009 | 09:31 PM
  #5  
AChotrod's Avatar
11 Second Club
iTrader: (17)
 
Joined: Jul 2008
Posts: 9,896
Likes: 1
From: Chicago area
Default

well seems you figured it out! Let us know!
Reply




All times are GMT -5. The time now is 06:50 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE