Third cylinder is missing and it is running rich?

Tiny
BUCKDM
  • MEMBER
  • 1998 GMC C1500
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 305,000 MILES
3rd cylinder is missing and it's running rich?
Friday, October 6th, 2023 AT 10:26 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
If you have a misfire the system thinks the engine is running lean so it will increase the fuel input to its max. So, we need to fix the misfire and that part should go away. Let's remove the spark plug for inspection and replace it if needed.

This guide can help:

https://www.2carpros.com/articles/how-to-change-spark-plugs

If that does not help let's do a compression test.

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

This guide can help as well:

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

Please go over these guides and get back to us.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, October 6th, 2023 AT 10:46 AM

Please login or register to post a reply.

Related Engine Rich Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Running Rich
GUIDE
Engine Running Rich
This guide was created to show you what can cause an automotive engine to have a rich fuel mixture, which may cause black smoke to be released form the exhaust tail pipe as...
VIEW MORE

Sponsored links