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

p0300 giving some problems, need some help!

Thread Tools
 
Search this Thread
 
Old Nov 1, 2008 | 03:45 PM
  #1  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default p0300 giving some problems, need some help!

A friend has a 96z and recently the car has been a nightmare. He's replaced various ignition components to no avail, and now hes getting to the point of running it into a ditch and burning the car down . Here's the symptoms and list of new parts.

Car runs decent at part throttle, but under load it pops and misfires. Although it still hauls a$$(beat my friends low 13sec stock LS1) its got ignition issues that don't seem to go away. For a period of 15-20min the car ran without a hiccup but all the problems came back right after. SO what do you guys think, should he burn it yet...LOL?

New parts:

AC Delco opti
NGK TR55 plugs
Autozone replacement wires
Autozone coil
ICM checked out to be in good working order
Fuel filter(old one was clogged)
Opti harness looks good

Mods:

Hotcam kit
LT's w/ bullet dumped
K&N CAI
TB air foil
3.73's
stock converter
Reply
Old Nov 1, 2008 | 04:31 PM
  #2  
shutzero's Avatar
TECH Enthusiast
 
Joined: Sep 2008
Posts: 636
Likes: 0
From: Cheshire, CT
Default

Check o2 sensors and check to see if there is any arcing
Reply
Old Nov 1, 2008 | 06:36 PM
  #3  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

Told my friend to check the wires and make sure they weren't touching as I've heard that causes issues with the ignition. Waiting for him to get back to me on that.
Reply
Old Nov 2, 2008 | 02:17 AM
  #4  
robsquikz28's Avatar
TECH Veteran
iTrader: (246)
 
Joined: Mar 2008
Posts: 4,984
Likes: 1
From: Chicago/Crown point
Default

pull the o2 sensor and then erase the codes and run the car it should be fine and if no codes and runs better then replace the 02s
Reply
Old Nov 2, 2008 | 09:06 AM
  #5  
street demon2k3's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: Aug 2003
Posts: 591
Likes: 0
From: Palmview, Tx
Default

Didnt think about ruuning the car in open loop, I remember my car ran fine like that till I was able to replace the 02's. Thanks for the tip, we'll try it and post back.
Reply
Old Nov 2, 2008 | 09:25 AM
  #6  
sdm1234's Avatar
TECH Fanatic
15 Year Member
iTrader: (8)
 
Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
Default

My car was getting that code and it ended up to be the EGR valve. Make sure that isn't clogged up.
Reply




All times are GMT -5. The time now is 04:05 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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