Misfire detected at Cylinder six?

ALIAHMAS

MEMBER
2014 JEEP GRAND CHEROKEE
3.6L
V6
4WD
AUTOMATIC
90,000 MILES

Hello,

I had this issue since last week.
I did replacement for the following:
1. Spark plug.
2. Fuel injector.
3. Check wiring harness.
4. Use engine flush.
5. Change oil.

The misfire live data value drops down but there are still little.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

I would test the ignition coil which can go out, here is a guide to help you and how to change out the ignition coil as well:

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

and

https://youtu.be/baq_aEWNQ0Y?si=qSRwJwUDVoHnXPHq

Here is a guide to help with the problem as well:

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

Can I ask how the engine sounds when running, is there a ticking sound? If so, can you upload a short video of the noise so I can hear it, you may have a roller follower that has gone bad. Check out the images (below). Let us know how it goes.

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Saturday, November 25th, 2023 AT 10:23 AM

ALIAHMAS

MEMBER
2 POSTS

Thank you, Sir, for your response. This a video from inside and outside car, there is a little sound of ticking especially when idle. I noticed something yesterday the light inside the car when turn on at idle have little fluctuation otherwise the car performance is good at all.

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Friday, December 1st, 2023 AT 4:25 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Thanks for the videos, yep it sounds like a roller follower that has come apart which is common, here is how to remove the valve cover so you can inspect the roller follower for #6 cylinder which is on the driver side rear cylinder. If the roller follower is bad it will cause a misfire codes even though the engine seems to be running pretty good. Check out the images (below). Please upload pictures or videos of the problem so we can see what's going on.

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