SPONSORED LINKS

Misfire?

Tiny
KJ
  • MEMBER
  • 2008 GMC SIERRA
  • 5.3L
  • 250,000 MILES
I was told this could be a DOD problem, but I don't believe it is because there's no lifter ticking. I pulled the plug wires off one at a time and found two cylinders down. I replaced the coil, and it did not change anything. Someone told me that I would need to clear the code afterwards, but I have not tried that.
SPONSORED LINKS
Monday, July 11th, 2022 AT 4:59 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Hi,

Did you check if the affected cylinders are getting spark even with the new coils? Also, what codes are you getting?

As far as clearing the code, that won't change a misfire. If the problem was solved, you would feel the difference.

Do me a favor. First, confirm there is spark to the affected cylinders. Here is a link that shows how it's done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Also, let me know what codes you find.

Take care,

Joe
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, July 11th, 2022 AT 10:12 PM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links