Ongoing'01 Laredo issues
#1
Newbie
Thread Starter
Join Date: Sep 2012
Location: Central Florida
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0L straight 6
Ongoing'01 Laredo issues
4.0L straight 6, manual fuel injection
ok, so it started with an intermittent miss, then turned into a dead cylinder. had plugs, wires, distributor cap, rotor and coil replaced. smoothed it out for a while, then the intermittent miss came back. now, it doesnt want to start. cranks forever before it fires. seems like it is starved for fuel, so i am figuring this whole ongoing issue could have been fuel pump related. as i am no cherokee specialist, i figured you guys' input would be nice on this matter.
and just to clarify, it is not throwing any injector codes or anything, already been checked. fuel filter was just recently changed, throttle linkage was recently tightened, so that narrows things down a bit too.
ok, so it started with an intermittent miss, then turned into a dead cylinder. had plugs, wires, distributor cap, rotor and coil replaced. smoothed it out for a while, then the intermittent miss came back. now, it doesnt want to start. cranks forever before it fires. seems like it is starved for fuel, so i am figuring this whole ongoing issue could have been fuel pump related. as i am no cherokee specialist, i figured you guys' input would be nice on this matter.
and just to clarify, it is not throwing any injector codes or anything, already been checked. fuel filter was just recently changed, throttle linkage was recently tightened, so that narrows things down a bit too.
Last edited by StumpJerker; 10-11-2012 at 07:58 AM.
#2
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
Being an 01, ya gotta be leery of the 0331 head. It has an inherently weak wall between cylinder 3 and 4. But! It really doesn't sound like thats the problem. I would suggest the o2 sensor/s. You had mentioned how it sounds starved for fuel, which can be called running dead lean. This is when it starts pulling in a lot of air but also chugs/bucks/stumbles like the fuel is being cut out. Get it on a good diagnostics machine (with a mechanic good enough to know what he's looking for) and start looking over sensor functions.
#4
Newbie
Thread Starter
Join Date: Sep 2012
Location: Central Florida
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0L straight 6
4.0L straight 6, manual fuel injection
ok, so it started with an intermittent miss, then turned into a dead cylinder. had plugs, wires, distributor cap, rotor and coil replaced. smoothed it out for a while, then the intermittent miss came back. now, it doesnt want to start. cranks forever before it fires. seems like it is starved for fuel, so i am figuring this whole ongoing issue could have been fuel pump related. as i am no cherokee specialist, i figured you guys' input would be nice on this matter.
and just to clarify, it is not throwing any injector codes or anything, already been checked. fuel filter was just recently changed, throttle linkage was recently tightened, so that narrows things down a bit too.
ok, so it started with an intermittent miss, then turned into a dead cylinder. had plugs, wires, distributor cap, rotor and coil replaced. smoothed it out for a while, then the intermittent miss came back. now, it doesnt want to start. cranks forever before it fires. seems like it is starved for fuel, so i am figuring this whole ongoing issue could have been fuel pump related. as i am no cherokee specialist, i figured you guys' input would be nice on this matter.
and just to clarify, it is not throwing any injector codes or anything, already been checked. fuel filter was just recently changed, throttle linkage was recently tightened, so that narrows things down a bit too.
Thread
Thread Starter
Forum
Replies
Last Post
Zerocyde
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
45
06-29-2022 05:51 PM
Bookspans
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
03-17-2021 07:41 PM
Fsandefur
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
3
09-15-2015 08:50 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)