Sep 21, 2015, 03:49 PM
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XJ Ask the Question Thread
CF Veteran
Joined: Sep 2011
Posts: 1,062
Likes: 0
From: Reidsville NC
Year: 1994
Model: Cherokee
Engine: 4.0
It could certainly be something else entirely, I'm just thinking along the lines of the stuff I've seen cause people to suddenly stop driving a car and unload it. Figuring this stuff out is half the fun and challenge of owning a vintage jeep! They're like noisy, driveable Rubik's cubes... Immensely satisfying to get one sorted out, but then you get to mess it all up again in the name of modification.
Seasoned Member
Joined: Mar 2014
Posts: 498
Likes: 1
From: Central Texas
Year: 1996
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Jan 2015
Posts: 1,381
Likes: 3
From: Southern Maryland
Year: 1991
Model: Cherokee
Engine: 1999 4.0L
got it to start ideals fine and when you baby the pedal she's good but if get on it at all it Boggs down and backfires like crazy! Any ideas on whit it is? I'm paying 500 cash for her
No, I don't lick fish.
Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Newbie
Joined: Jul 2015
Posts: 4
Likes: 0
Model: Cherokee
mis fire number 1 cyl, '95 grand cherokee 4L
There is an intermintent mis-fire of # 1 cyl. No spark at distributor tower. One time it's OK, an hour latter the misfire is back. Changed CS sansor, Cam sensor, cap and rotor. The security mod. had been removed just days before.
Junior Member
Joined: Mar 2015
Posts: 41
Likes: 0
From: Eastern CT
Year: 98
Model: Cherokee
Engine: 2.5
inconsistent fuel pressure
98 Jeep Cherokee 2.5l, 2wd, stick shift. Recently bought the Jeep, and I've never had alot of acceleration. I know its the 4 cylinder and not the 6, but I can't even beat a prius if I try to race them. I decided to check the fuel pressure, and it's inconsistent when idling, but levels out at 45 or so when the throttle is hit. here's a video:
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
EDIT: also worth noting, I left the fuel pressure tester hooked up after I turned the car off, and it stayed at 45 psi. Just to be thorough, I left it hooked up to see if I had a leak in the system. After 25 minutes, the pressure dropped down to 32. I wasn't too thrilled with the tester, as it leaked when I put it at a certain angle, but I wasn't moving it at all when it was sitting there.
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
EDIT: also worth noting, I left the fuel pressure tester hooked up after I turned the car off, and it stayed at 45 psi. Just to be thorough, I left it hooked up to see if I had a leak in the system. After 25 minutes, the pressure dropped down to 32. I wasn't too thrilled with the tester, as it leaked when I put it at a certain angle, but I wasn't moving it at all when it was sitting there.
Last edited by moparchero; Aug 1, 2015 at 09:20 AM.
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Ask the Question Thread
98 Jeep Cherokee 2.5l, 2wd, stick shift. Recently bought the Jeep, and I've never had alot of acceleration. I know its the 4 cylinder and not the 6, but I can't even beat a prius if I try to race them. I decided to check the fuel pressure, and it's inconsistent when idling, but levels out at 45 or so when the throttle is hit. here's a video:
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
No, I don't lick fish.
Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
98 Jeep Cherokee 2.5l, 2wd, stick shift. Recently bought the Jeep, and I've never had alot of acceleration. I know its the 4 cylinder and not the 6, but I can't even beat a prius if I try to race them. I decided to check the fuel pressure, and it's inconsistent when idling, but levels out at 45 or so when the throttle is hit. here's a video:
98 jeep Cherokee 2.5l inconsistent fuel pressure - YouTube
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
EDIT: also worth noting, I left the fuel pressure tester hooked up after I turned the car off, and it stayed at 45 psi. Just to be thorough, I left it hooked up to see if I had a leak in the system. After 25 minutes, the pressure dropped down to 32. I wasn't too thrilled with the tester, as it leaked when I put it at a certain angle, but I wasn't moving it at all when it was sitting there.
98 jeep Cherokee 2.5l inconsistent fuel pressure - YouTube
I've changed the plugs, wires, rotor, cap, oil, air filter, and seafoamed everything since I've bought it. Any ideas for me to try?
EDIT: also worth noting, I left the fuel pressure tester hooked up after I turned the car off, and it stayed at 45 psi. Just to be thorough, I left it hooked up to see if I had a leak in the system. After 25 minutes, the pressure dropped down to 32. I wasn't too thrilled with the tester, as it leaked when I put it at a certain angle, but I wasn't moving it at all when it was sitting there.
This is definitely where I'd start, followed by taking the injectors out, using a 9v to supply power to them to open the injector up and clean them out, and take off your throttle body and give it a good cleaning by hand. Out of curiosity, what spark plugs did you put in and what did you gap them to?
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
No, I don't lick fish.
Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
