SPONSORED LINKS

Intermittent misfire while driving

Tiny
MHUBSHMAN
  • MEMBER
  • 2002 GMC ENVOY
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
At stops it wants to stall. Misses bad on and off while driving. I changed cam sensor, crank sensor, new plugs, cleaned throttle body. Still runs the same.
Friday, December 11th, 2020 AT 2:58 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Did you change the boots on the coil when you replaced the plugs? They are very common for failing.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

I would also do a compression test to be sure the internals are good in the engine.

https://www.2carpros.com/articles/how-to-test-engine-compression

What are the codes that are set?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Roy
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, May 17th, 2021 AT 5:35 PM
Tiny
MHUBSHMAN
  • MEMBER
  • 2 POSTS
Showing no codes.
Was this
answer
helpful?
Yes
No
Monday, May 17th, 2021 AT 5:35 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, I would do the other checks I suggested.

Roy
Was this
answer
helpful?
Yes
No
+1
Monday, May 17th, 2021 AT 5:35 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