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

Knock sensors and misfires

Thread Tools
 
Search this Thread
 
Old Mar 18, 2022 | 12:29 PM
  #1  
Michael Gerace's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2018
Posts: 56
Likes: 5
Default Knock sensors and misfires

Has anyone driven on roads so rough that you can see truck misfire watching the computer? Could that be coming from the knock sensors? Lately I've been getting misfires on my 4.8l when cold starting. Most on #7 & #8. But still on random cylinders. 296,000 miles

Last edited by Michael Gerace; Mar 18, 2022 at 12:31 PM. Reason: Thought of something else
Reply
Old Mar 18, 2022 | 01:15 PM
  #2  
theunderlord's Avatar
TECH Fanatic
 
Joined: Jan 2022
Posts: 1,034
Likes: 468
From: Seattle
Default

What vehicle is this? What are the condition of the coils/plugs/wires? Original knock sensors?
Reply
Old Mar 18, 2022 | 01:34 PM
  #3  
Michael Gerace's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2018
Posts: 56
Likes: 5
Default

Originally Posted by Michael Gerace
Has anyone driven on roads so rough that you can see truck misfire watching the computer? Could that be coming from the knock sensors? Lately I've been getting misfires on my 4.8l when cold starting. Most on #7 & #8. But still on random cylinders. 296,000 miles
It's an 05 Silverado. Knock sensors are original. Put new plugs and wires about 150,000 miles ago. Coils and harness, MAF, TB all else original.
Reply
Old Mar 18, 2022 | 01:36 PM
  #4  
Michael Gerace's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2018
Posts: 56
Likes: 5
Default

Changed intake gaskets a few years back
Reply
Old Mar 18, 2022 | 01:39 PM
  #5  
Michael Gerace's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2018
Posts: 56
Likes: 5
Default

Left Bank has no cat and Right bank is original
Reply




All times are GMT -5. The time now is 10:22 AM.

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