2002 Chevy Silverado 4.3 liter #4 cylinder misfire - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > General Discussion Forums > General Tech
Log In 

General Tech Good at troubleshooting? Have a non-specific issue? Discuss general tech topics here. IF YOUR QUESTION IS SPECIFIC TO A CERTAIN MODEL, IT DOES NOT GO IN THIS SECTION.

LinkBack Thread Tools Search this Thread
Old 01-19-2009, 09:45 PM
Junior Member
Join Date: Jan 2009
Posts: 1
Default 2002 Chevy Silverado 4.3 liter #4 cylinder misfire

Hi guys I have a question I own a 2002 Silverado 4.3 liter 4wd automatic the ob2 says the #4cyl is misfiring. I changed the plugs, wires, cap, rotor, and reset the computer and 15 min later the check eng light came back on. The motor does not seem to be misfiring I am kinda lost if anybody has any suggestion I would definitly appreciate it
Reply With Quote
Old 01-24-2009, 04:26 PM
Junior Member
Join Date: Jan 2009
Posts: 3

Just don't mess with this by yourself. It may take you to more expensive work. Just get it checked by some professional mechanic. A chevy mechanic.
Chevy Silverado Headlights
Reply With Quote
Old 11-27-2010, 10:14 PM
CF Beginner
Join Date: Nov 2010
Posts: 1

01Softail, did you ever figure out the #4 misfire problem? I just got an 02 with a 4.3 for my son. it has 120k and is having the same problem. has had the problem for 20k been to a couple dealers who went as far as changing timing chain and gear. I had it in the shop for a week and they did compression tests, injector tests and couldn't figure it out. I changed plugs, wires, cap an rotor, ran sea foam, premium fuel (won't run ethanol in anything). I'm about to start looking in to rebuilt heads. Dealer and Chevy mechanics have been worthless!
Reply With Quote
Old 02-22-2012, 08:13 PM
CF Beginner
Join Date: Feb 2012
Posts: 6

Im having the same problem on #7 cylinder, i already changed the spark plugs, the wires, swaped the coil from another cylinder, cleaned the throttle but non of those worked because the engine light is still on after being cleared. tomorrow im gonna take my truck to the shop to get the injectors cleaned and i hope that works.

Silverado 06 5.3l 4x4
Reply With Quote
Old 02-25-2012, 04:26 PM
CF Junior Member
Join Date: May 2009
Posts: 34
Default Misfire

did anybody do a radiator pressure check? You might have a internal coolant leak. Like a intake manifold gasket or head gasket.
Reply With Quote
Old 02-25-2012, 08:13 PM
CF Beginner
Join Date: Jan 2012
Posts: 16

If you have a 4.3 need to check fuel presure after ignition cycled on maybe fuel presure regulator leaking in intake causing misfire,the 4.3 does not use seperate coils but the 4.8 and 5.3 due for those with the v8s listen to injectors with long screwdriver on lower protion and listen for the click sound to see if they sound like others if they sound good gooing to need to do running compresion test and injector drop(balance test).Hope that helps.
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
2000 silverado 5.3 liter multiple cylinder misfire, need help!! a_rodgers07 Silverado & Fullsize Pick-ups 0 05-20-2013 05:20 PM
2001 4.3 liter express- starts, runs with misfire, then wont start jdom19671 Express & G-Series Vans 1 06-25-2012 11:10 AM
Looking for input with 2002 silverado 1500 5.3L multiple cylinder misfire wmichaud Silverado & Fullsize Pick-ups 9 04-09-2011 08:30 PM
96 5.7 silverado cylinder 3 misfire snunicycler Silverado & Fullsize Pick-ups 0 01-29-2011 10:11 PM
2.8 liter to 4.3 liter swap mudrider S-10 & Blazer 12 03-14-2010 09:42 PM

1, 1997, 2002, blazer, chevrolet, chevy, code, cylinder, engine, forum, mechanic, misfire, s10, silverado, trailblazer, venture

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 07:50 PM.