What makes my 05 TJ stumble at times?

Charger53

New Member
Joined
Nov 3, 2019
Messages
3
Location
Bogalusa La
What makes my 05 TJ stumble at times (hard miss) ? I’ve changed both the crankshaft position sensor and the throttle position sensor.
 
Yes , misfire, changed plugs. Throttle position sensor and crankshaft position sensor. Changed both. Still stumbles hard

What spark plugs did you use? What did you gap them to? What brand of sensors? Have you done a leak down test just to rule out a potentially cracked head?
 
When is it happening?

This is an important question!

- Does it happen when the vehicle is only cold?
- Does it happen only when the vehicle is hot?
- Does it happen regardless of being hot or cold?

The more specific you are, the better we're able to help!
 
I had a stumble after a full engine rebuild. Ended up replacing O2 sensors with NGK from rock auto. $60 for both shipped to home. Jeep was very “jerky” and not smooth. Like a new vehicle now.
Soaked sensors in PB for a few days, then went at it.
Would recommend having a spark plug pitch thread to clean out holes anyway.
Runs like a top now.