20k on 4.0 rebuild. Engine dies
06-30-2017, 03:52 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
20k on 4.0 rebuild. Engine dies
So, I rebuilt my 4.0 about 20k miles ago. I was driving it and everything seemed normal until I gave it some throttle and it started sputtering. It smoothed out and was fine until I got home. I went out to start it about 10 min after the trip on the highway and it revved, sputtered and died at idle. Now a day later it idles for awhile and then dies. If I give it any gas it shudders and dies. Any ideas?
06-30-2017, 06:20 PM
#3
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
Fuel pressure is good. Cam sensor and coil rail codes are showing up on the scanner. Going to try the sensor first
06-30-2017, 06:26 PM
#5
Junior Member
Join Date: Jan 2012
Location: Washington State
Posts: 45
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 4.0
Regarding rough running
If you have a rusted muffler and/or catalytic converter it can plug up the exhaust gasses and cause you all kinds of havoc. Happened to me.
07-01-2017, 01:19 PM
#6
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
There is nothing in stock locally. Just ordered a mopar cam sensor, an airtex viper coil, a patch cable for the coil and a universal plug wire set.
07-02-2017, 09:54 AM
#7
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
Trending Topics
07-02-2017, 11:10 AM
#9
Senior Member
Join Date: Mar 2014
Location: Eastern Long Island, NY
Posts: 952
Received 55 Likes
on
50 Posts
Year: 1996
Model: Cherokee
Engine: I6 Cyl / 4L
It could be electrical too. I had my Jeep sit for a few months while I took my time replacing the front suspension. When I got it running again, the alternator had seized. After I changed it, the old battery wouldn't hold a charge anymore, so it would idle for a little bit after startup and then die.
07-03-2017, 09:54 PM
#10
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
07-07-2017, 04:29 PM
#11
Junior Member
Thread Starter
Join Date: Apr 2014
Location: MO
Posts: 59
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: Rebuilt 4.0 w/0630 Head swap
9It's back to life! Replaced the cam sensor and set the timing. I replaced the coil rail with the viper coil and now it seems to be good. Haven't gone on a drive yet because I have to figure out where the coil is going to be mounted
Last edited by kcirwilliams; 07-07-2017 at 04:32 PM.