My 2000 xj.
Junior Member
Joined: Apr 2012
Posts: 98
Likes: 0
From: Salt lake city
Year: 1995 4runner
Engine: 3.0
Well got my motor in and running and seems it might be coming back out. It idles perfect but has a knock noise at 2 grand. Dropped the pan and pulled all the caps and they all looked perfect. Bore scoped all the cylinders and they looked fine. It sucks we can't determine where it is coming from for sure. It sounds like the back of the motor. It is a rotational clunk...
Well got my motor in and running and seems it might be coming back out. It idles perfect but has a knock noise at 2 grand. Dropped the pan and pulled all the caps and they all looked perfect. Bore scoped all the cylinders and they looked fine. It sucks we can't determine where it is coming from for sure. It sounds like the back of the motor. It is a rotational clunk...
Thread Starter
CF Veteran
Joined: Sep 2010
Posts: 4,968
Likes: 0
From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
Well got my motor in and running and seems it might be coming back out. It idles perfect but has a knock noise at 2 grand. Dropped the pan and pulled all the caps and they all looked perfect. Bore scoped all the cylinders and they looked fine. It sucks we can't determine where it is coming from for sure. It sounds like the back of the motor. It is a rotational clunk...
Thread Starter
CF Veteran
Joined: Sep 2010
Posts: 4,968
Likes: 0
From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
Hopfully yours is a simple fix!
Thread Starter
CF Veteran
Joined: Sep 2010
Posts: 4,968
Likes: 0
From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
Well no bummer needed we got it figured out without pulling the motor. Disconnected the tps sensor and fired it up just to see if it was spark knock / ignition timing issue. Fired it up and bam! No noise and it ran even better. I took it out and drove it without the sensor hooked up and it ran awesome. So now I need to get the PCM tuned to what I need and then I should be good to go. Obviously stock settings on a factory PCM is no good with this motor.
Thread Starter
CF Veteran
Joined: Sep 2010
Posts: 4,968
Likes: 0
From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
Well no bummer needed we got it figured out without pulling the motor. Disconnected the tps sensor and fired it up just to see if it was spark knock / ignition timing issue. Fired it up and bam! No noise and it ran even better. I took it out and drove it without the sensor hooked up and it ran awesome. So now I need to get the PCM tuned to what I need and then I should be good to go. Obviously stock settings on a factory PCM is no good with this motor.
Thread Starter
CF Veteran
Joined: Sep 2010
Posts: 4,968
Likes: 0
From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
I honestly don't see the need for it, I like the stability feeling of the leafs. I feel my leafs flex plenty and make me feel more stable. Most TJ/ZJ's I have wheeled with get pretty tippy in off camber situations and the work/cost of it just doesn't seam worth it in the long run. I may in the future, but at that point I'll be swapping axles too, if it ever gets there.... 14BFF and D60.
Senior Member
Joined: Nov 2012
Posts: 523
Likes: 0
From: Plymouth CT
Year: 1988
Model: Cherokee
Engine: 4.0L
I honestly don't see the need for it, I like the stability feeling of the leafs. I feel my leafs flex plenty and make me feel more stable. Most TJ/ZJ's I have wheeled with get pretty tippy in off camber situations and the work/cost of it just doesn't seam worth it in the long run. I may in the future, but at that point I'll be swapping axles too, if it ever gets there.... 14BFF and D60.

But what you said is true, but can aslo be solved look at N20s build hes got it down!


