Notices
TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

when to replace ignition coils

Old June 23rd, 2019, 8:47 PM
  #1  
CF Beginner
Thread Starter
 
Join Date: Sep 2018
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default when to replace ignition coils

Hello at what mileage should you replace ignition coils.
trailbenz is offline  
Old June 23rd, 2019, 9:51 PM
  #2  
CF Active Member
 
Join Date: May 2015
Posts: 237
Likes: 0
Received 12 Likes on 11 Posts
Default

Unless the computer is showing a lot of misfires even after replacing plugs and wires, I wouldn't waste the money on them.

My 5.3l has over 290,000 miles on the original ignition coils. I was chasing what I thought was a misfire issue caused by aging coils so I replaced them all but it made no difference. Turns out, the plugs that only had about 13,000 miles on them were counterfeit! The supposed iridium tips were worn down to nubs. The idle was much smoother after replacing them with genuine plugs but the real problem was a bad torque converter. I swapped the original coils back in and everything is still running great.
KChevy75 is offline  
Old June 24th, 2019, 7:33 AM
  #3  
CF Addict
 
oldchevy's Avatar
 
Join Date: Apr 2012
Location: Miami, FL.
Posts: 3,611
Likes: 0
Received 3 Likes on 3 Posts
Default

There is an old saying. If it ain't broke, don't fix it!
oldchevy is offline  
Old June 24th, 2019, 9:19 AM
  #4  
CF Monarch
 
kevinkpk's Avatar
 
Join Date: Jul 2011
Posts: 4,554
Likes: 0
Received 7 Likes on 6 Posts
Default

It's not a Ford.
kevinkpk is offline  
Old June 24th, 2019, 9:11 PM
  #5  
CF Monarch
 
tech2's Avatar
 
Join Date: Mar 2011
Posts: 6,761
Likes: 0
Received 5 Likes on 5 Posts
Default

+4
they are not a maintenance item...replace them when they fail.
tech2 is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: