Help needed with misfire
09-18-2020, 09:13 PM
#1
Newbie
Thread Starter
Join Date: Sep 2020
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee (XJ)
Engine: 4.0
Help needed with misfire
Hello I’m new to the group and I need some help with my 2000 xj classic. Has a miss I can’t find changed all sensors new fuel pump plugs spark rail no check engine but has a miss at low idle then it misses at 55-60 any input would be appreciated.
09-20-2020, 06:38 PM
#2
CF Veteran
Have you tried pulling the plugs to see if any of them have fowled since you recently changed them? What about a cylinder compression test?
09-20-2020, 07:16 PM
#3
Newbie
Thread Starter
Join Date: Sep 2020
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee (XJ)
Engine: 4.0
that’s what I’m going to do tomorrow I’m at a end with it. I don’t wanna go to a shop but may have too. Checked injectors today they seemed ok. Just don’t know what to do
09-20-2020, 07:38 PM
#4
Old fart with a wrench
You may have a burnt exhaust valve in #3 or #4. They are the ones that run the hottest because they are paired right in the middle of the head and get hotter than the old engines because of the cast iron manifolds on the 2000-2001. I suspect this is the reason the 0331 head cracks, because of the extra heat. A cylinder leakdown test will show you if this is true.
Thread
Thread Starter
Forum
Replies
Last Post
RunnerInPink
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
01-01-2014 10:22 AM
ThE_CaPtaIn
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
07-27-2011 05:40 PM
northline76
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
07-17-2011 07:25 PM
N3GH
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
12-06-2009 09:17 AM
hillaholic
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
05-15-2009 01:49 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)