Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Missfire

Thread Tools
 
Search this Thread
 
Old Mar 23, 2017 | 03:06 PM
  #1  
Oldgtonick's Avatar
Thread Starter
Teching In
 
Joined: Feb 2017
Posts: 17
Likes: 0
Default Missfire

Changed plug and wires cool packs are good but clyinders 1&4 are dead did a compression check and it had plenty lifters aren't soft and rockers are good what else could it be?? Also started backfiring through intake
thanks in advance

Last edited by Oldgtonick; Mar 23, 2017 at 05:22 PM.
Reply
Old Mar 23, 2017 | 03:20 PM
  #2  
moekluse's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Nov 2015
Posts: 543
Likes: 4
From: Nc
Default

Check for spark on those cylinders
Reply
Old Mar 23, 2017 | 05:23 PM
  #3  
Oldgtonick's Avatar
Thread Starter
Teching In
 
Joined: Feb 2017
Posts: 17
Likes: 0
Default

It has it... it started popping in the intake now after swaping injectors
Reply
Old Mar 23, 2017 | 05:34 PM
  #4  
RockinWs6's Avatar
TECH Addict
 
Joined: Mar 2013
Posts: 2,628
Likes: 30
Default

Are the valves opening and closing? cracked springs?
Reply
Old Mar 24, 2017 | 11:05 AM
  #5  
nine8ss's Avatar
Launching!
iTrader: (5)
 
Joined: Feb 2016
Posts: 253
Likes: 2
From: Tucson, AZ
Default

Did this problem start after the wire/plug change or are you trying to fix a previous misfire?
Reply
Old Mar 24, 2017 | 11:28 AM
  #6  
pantera_efi's Avatar
FormerVendor
iTrader: (1)
 
Joined: Nov 2008
Posts: 2,155
Likes: 18
From: Santa Ana, CA. USA
Default Wire Resistance

Hi, did you use Silicon Grease ?

Did you crack those plugs ?

Would you measure wire resistance AND report ?

What brand of SPW ?

What SP and Gap ?

Lance
Reply




All times are GMT -5. The time now is 09:24 PM.

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