Ok I have a 2000 Grand Cherokee Larado. I am having misfire issues. The plugs and coil are new. Any thoughts?

 

*Under what conditions? Idle, load, all the time?

*Are you having to add antifreeze to the coolant reservoir?

*Exactly what cylinder(s) are misfiring? Post the exact code, not just a description

*Is the check engine light on now? Is it or has it ever been in a "flashing" mode?

 

Not having to add coolant. Code 0306 cylinder 6. No check engine light. It has a hesitation when accelerating usually around 20 mph but fine after 30 mph

 

1. What brand of plugs are you using? Were they gapped to .035 when installing?

2. You could try swapping the #6 fuel injector to another cylinder, then drive it. If your misfire follows to that new cylinder, you have your culprit.

3. Run a compression test. Can't completely ignore the possibility of something internal. A compression test is really quite easy to perform and is a very good "snapshot in time" on how things are going inside.

 

ok I will give those things a try. The plugs were set right and I used the factory recommended