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XJ Ask the Question Thread
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
on your year? power steering pump has a slotted hole in the top. Loosen the top bolt, and there is an adjustment bolt on the bottom of the PS pump, with the head toward the air filter box. Screw in to loosen the belt, screw out to tighten. Removing the air box to do this is extremely helpful.
Junior Member
Joined: Jul 2011
Posts: 95
Likes: 0
From: North Carolina
Year: 1992
Model: Cherokee
Engine: 4.0
There is a low pressure switch on top of the accumulator on the passenger side of the compressor. Unplug it and just a paper clip to jumper the pins. If the compressor kicks on, you need to recharge your a/c system.

If just the aux. fan kicks on, try LIGHTLY tapping on the compressor clutch with the plastic end of a large screwdriver. It may be just frozen up or in need of shim adjustment.

If just the aux. fan kicks on, try LIGHTLY tapping on the compressor clutch with the plastic end of a large screwdriver. It may be just frozen up or in need of shim adjustment.
---------------------------------
AAAAND I can use some help again. I jumped it as I should, and the clutch engaged and made the most godawful screeching/grinding/squealing noise. It almost sounded like the pulley wasn't moving and the belt was being dragged across. It did this twice, and I was afraid of trying again because it really sounded like I was going to destroy something. I didn't get a good look at it but I could see the clutch engaging.
So the low pressure switch is apparently tripped for a reason. I must be low on freon, so that means a leak somewhere. I can deal with that, I'll just inspect every hose and part I can get my hands on (except for the parts under the dash because that doesn't sound like fun anyway). The noise scares me though. What can I do about that? I can upload a video if necessary so you can get an idea of what it sounds like.
Last edited by BobIsAwesome; Aug 8, 2011 at 07:20 AM. Reason: cause I'm a SOUL MAN!
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
probably just needs to be lubed up from now moving for so long. Spray some penetrating oil in the clutch area.
Also could be that the compressor needs oil to be added when the system is recharged - which it certainly needs to be. If your system is like mine, it's completely empty. I advise taking it to a a/c shop to get a vacuum pulled on the system to discover where it's leaking, and to recharge (with the proper amount of oil added) it if it's not. The little cans you find in parts stores won't do much in this situation.
Also could be that the compressor needs oil to be added when the system is recharged - which it certainly needs to be. If your system is like mine, it's completely empty. I advise taking it to a a/c shop to get a vacuum pulled on the system to discover where it's leaking, and to recharge (with the proper amount of oil added) it if it's not. The little cans you find in parts stores won't do much in this situation.
Hello,
I am new here and already I have learned a lot reading posts. I don't know if I am posting this in the right place. Sorry if its not.
But I need help bad.
I am a Marine Technician so I have some knowledge of mechanics.
I have a 1996 XJ 2wd. My Jeep is not starting when it gets hot. Couple days ago I noticed my Jeep was idling high @ 1100 rpm and when driving if I lifted off the gas pedal the Jeep would not slow down, the idle would stay the same. At times depending on the speed, it would even accelerate.
I then stopped to get gas and the Jeep would not start. It would turn over but nothing. I feathered the gas and it would try but it just wasn't getting any gas. I was able to hook up my fuel pressure gauge when I got it running ( its had cooled down) and was at 50psi. with no drop that I could tell.
I thought right away, ok fuel pump. But it is running back there. (when the Jeep is cold, it will start up like normal) I replaced the fuel filter mounted under the body. Nothing.
I look at my throttle body and found heavy carbon build up in the lower half of it under the butterfly. I took it off and cleaned it with cleaner. I took the idle air control valve off and there was a lot of build up on that so I cleaned it good with a wire brush. Put it back together and it seemed to run ok for a day/half. I stopped yesterday to get some water and boom, it happened again. Would not start. I had a friend take me so that I could get a new IACV valve at the store and installed it, still nothing.
So, it will start like normal when its cold (first of the day) runs rough at idle and does not de-accelerate, if I turn it off it wont start again. If I feather the gas it will try to turn over but doesn't. You can smell the gas
Please!! Any help would be appreciated.
Thank you,
George
Orlando, Fl.
I am new here and already I have learned a lot reading posts. I don't know if I am posting this in the right place. Sorry if its not.
But I need help bad.
I am a Marine Technician so I have some knowledge of mechanics.
I have a 1996 XJ 2wd. My Jeep is not starting when it gets hot. Couple days ago I noticed my Jeep was idling high @ 1100 rpm and when driving if I lifted off the gas pedal the Jeep would not slow down, the idle would stay the same. At times depending on the speed, it would even accelerate.
I then stopped to get gas and the Jeep would not start. It would turn over but nothing. I feathered the gas and it would try but it just wasn't getting any gas. I was able to hook up my fuel pressure gauge when I got it running ( its had cooled down) and was at 50psi. with no drop that I could tell.
I thought right away, ok fuel pump. But it is running back there. (when the Jeep is cold, it will start up like normal) I replaced the fuel filter mounted under the body. Nothing.
I look at my throttle body and found heavy carbon build up in the lower half of it under the butterfly. I took it off and cleaned it with cleaner. I took the idle air control valve off and there was a lot of build up on that so I cleaned it good with a wire brush. Put it back together and it seemed to run ok for a day/half. I stopped yesterday to get some water and boom, it happened again. Would not start. I had a friend take me so that I could get a new IACV valve at the store and installed it, still nothing.
So, it will start like normal when its cold (first of the day) runs rough at idle and does not de-accelerate, if I turn it off it wont start again. If I feather the gas it will try to turn over but doesn't. You can smell the gas
Please!! Any help would be appreciated.
Thank you,
George
Orlando, Fl.
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
I have a 1996 XJ 2wd. My Jeep is not starting when it gets hot. Couple days ago I noticed my Jeep was idling high @ 1100 rpm and when driving if I lifted off the gas pedal the Jeep would not slow down, the idle would stay the same. At times depending on the speed, it would even accelerate.
I then stopped to get gas and the Jeep would not start. It would turn over but nothing. I feathered the gas and it would try but it just wasn't getting any gas. I was able to hook up my fuel pressure gauge when I got it running ( its had cooled down) and was at 50psi. with no drop that I could tell.
I thought right away, ok fuel pump. But it is running back there. (when the Jeep is cold, it will start up like normal) I replaced the fuel filter mounted under the body. Nothing.
I look at my throttle body and found heavy carbon build up in the lower half of it under the butterfly. I took it off and cleaned it with cleaner. I took the idle air control valve off and there was a lot of build up on that so I cleaned it good with a wire brush. Put it back together and it seemed to run ok for a day/half. I stopped yesterday to get some water and boom, it happened again. Would not start. I had a friend take me so that I could get a new IACV valve at the store and installed it, still nothing.
So, it will start like normal when its cold (first of the day) runs rough at idle and does not de-accelerate, if I turn it off it wont start again. If I feather the gas it will try to turn over but doesn't. You can smell the gas
Please!! Any help would be appreciated.
I then stopped to get gas and the Jeep would not start. It would turn over but nothing. I feathered the gas and it would try but it just wasn't getting any gas. I was able to hook up my fuel pressure gauge when I got it running ( its had cooled down) and was at 50psi. with no drop that I could tell.
I thought right away, ok fuel pump. But it is running back there. (when the Jeep is cold, it will start up like normal) I replaced the fuel filter mounted under the body. Nothing.
I look at my throttle body and found heavy carbon build up in the lower half of it under the butterfly. I took it off and cleaned it with cleaner. I took the idle air control valve off and there was a lot of build up on that so I cleaned it good with a wire brush. Put it back together and it seemed to run ok for a day/half. I stopped yesterday to get some water and boom, it happened again. Would not start. I had a friend take me so that I could get a new IACV valve at the store and installed it, still nothing.
So, it will start like normal when its cold (first of the day) runs rough at idle and does not de-accelerate, if I turn it off it wont start again. If I feather the gas it will try to turn over but doesn't. You can smell the gas
Please!! Any help would be appreciated.
Problem 1 - Since you already replaced the IAC and more or less cleaned the throttle body, look for any loose or leaking vacuum lines. They are critical to a good idle on these engines.
Problem 2 - This is most likely caused by a failing ignition coil. Being so close to the engine it's prone to heat-related failures, especially if it's original. It should be replaced.
I think you have 2 separate problems that may not be related. Problem one is the erratic/high idle, and problem 2 is the loss of ignition when hot.
Problem 1 - Since you already replaced the IAC and more or less cleaned the throttle body, look for any loose or leaking vacuum lines. They are critical to a good idle on these engines.
Problem 2 - This is most likely caused by a failing ignition coil. Being so close to the engine it's prone to heat-related failures, especially if it's original. It should be replaced.
Problem 1 - Since you already replaced the IAC and more or less cleaned the throttle body, look for any loose or leaking vacuum lines. They are critical to a good idle on these engines.
Problem 2 - This is most likely caused by a failing ignition coil. Being so close to the engine it's prone to heat-related failures, especially if it's original. It should be replaced.
I just went out to run it for the first time today. It started fine. Within a second of turning over. I took it around the block and the idle was still very high. I put it into drive let off the brake and with no foot on the gas it accelerated (slowly ) until it shifted gears. I then stopped it and started off again this time with gas up to about 1500 rpm, let off the gas and Jeep stayed there. I tried the same thing at 2000 rpm. Same result.
At this time it is at 200 F. So I pulled it back in the drive way (level I might add) and turned it off. I let it set for 2 minutes then tried to start it. It started right up.... ugh!!!!!
I took it around the block again this time the idle was lower @ 1000 vs. 1200 rpm. The throttle was still doing the same. Came back home again, now its @ 120 F. Turn it off, restarted and it fired right up. I now have no hair left...
I looked under the hood, listened for any vacuum leaks, could not hear anything. I adjusted the cable that runs from the throttle body down to the trans ( I have automatic) and moved it a couple of clicks out. Got in and drove it. Now it is hard shifting into gears but the idle has come down to normal, 800 rpm and the motor is responding when I let off the gas.
I went back home, moved the cable back to the orig. position and drove it again. Rpm's 800, throttle responding and the shift is much smoother. Normal. uuummmmm????!!!!
I am now going out to try and start it again.
Sorry this is so lengthy but I have something crazy going on. I know I have something getting ready to go, sensor, vacuum line, coil, cam sensor. Something, I just can figure it out. It did fine just like this after I cleaned the throttle body 2 days ago. Then all of a sudden it was back doing the same thing.
I hope this does not happen to anyone, if it does, pick up all the hair you have pulled out and donate it to cancer....
Thank you,
George
Orlando, Fl.
First let me thank you for response.
I just went out to run it for the first time today. It started fine. Within a second of turning over. I took it around the block and the idle was still very high. I put it into drive let off the brake and with no foot on the gas it accelerated (slowly ) until it shifted gears. I then stopped it and started off again this time with gas up to about 1500 rpm, let off the gas and Jeep stayed there. I tried the same thing at 2000 rpm. Same result.
At this time it is at 200 F. So I pulled it back in the drive way (level I might add) and turned it off. I let it set for 2 minutes then tried to start it. It started right up.... ugh!!!!!
I took it around the block again this time the idle was lower @ 1000 vs. 1200 rpm. The throttle was still doing the same. Came back home again, now its @ 120 F. Turn it off, restarted and it fired right up. I now have no hair left...
I looked under the hood, listened for any vacuum leaks, could not hear anything. I adjusted the cable that runs from the throttle body down to the trans ( I have automatic) and moved it a couple of clicks out. Got in and drove it. Now it is hard shifting into gears but the idle has come down to normal, 800 rpm and the motor is responding when I let off the gas.
I went back home, moved the cable back to the orig. position and drove it again. Rpm's 800, throttle responding and the shift is much smoother. Normal. uuummmmm????!!!!
I am now going out to try and start it again.
Sorry this is so lengthy but I have something crazy going on. I know I have something getting ready to go, sensor, vacuum line, coil, cam sensor. Something, I just can figure it out. It did fine just like this after I cleaned the throttle body 2 days ago. Then all of a sudden it was back doing the same thing.
I hope this does not happen to anyone, if it does, pick up all the hair you have pulled out and donate it to cancer....
Thank you,
George
Orlando, Fl.
I just went out to run it for the first time today. It started fine. Within a second of turning over. I took it around the block and the idle was still very high. I put it into drive let off the brake and with no foot on the gas it accelerated (slowly ) until it shifted gears. I then stopped it and started off again this time with gas up to about 1500 rpm, let off the gas and Jeep stayed there. I tried the same thing at 2000 rpm. Same result.
At this time it is at 200 F. So I pulled it back in the drive way (level I might add) and turned it off. I let it set for 2 minutes then tried to start it. It started right up.... ugh!!!!!
I took it around the block again this time the idle was lower @ 1000 vs. 1200 rpm. The throttle was still doing the same. Came back home again, now its @ 120 F. Turn it off, restarted and it fired right up. I now have no hair left...
I looked under the hood, listened for any vacuum leaks, could not hear anything. I adjusted the cable that runs from the throttle body down to the trans ( I have automatic) and moved it a couple of clicks out. Got in and drove it. Now it is hard shifting into gears but the idle has come down to normal, 800 rpm and the motor is responding when I let off the gas.
I went back home, moved the cable back to the orig. position and drove it again. Rpm's 800, throttle responding and the shift is much smoother. Normal. uuummmmm????!!!!
I am now going out to try and start it again.
Sorry this is so lengthy but I have something crazy going on. I know I have something getting ready to go, sensor, vacuum line, coil, cam sensor. Something, I just can figure it out. It did fine just like this after I cleaned the throttle body 2 days ago. Then all of a sudden it was back doing the same thing.
I hope this does not happen to anyone, if it does, pick up all the hair you have pulled out and donate it to cancer....
Thank you,
George
Orlando, Fl.
The 3rd it did it again. High rpm and no response on the throttle.
The 4th time around. It went back to normal.
I did not turn the motor off in between trips. I just can to a complete stop. And let it sit there like I was stopped at a traffic light.
I'm lost.
CF Veteran
Joined: Dec 2010
Posts: 1,246
Likes: 1
From: Missouri
Year: 1998
Model: Cherokee
Engine: I6 4.0 L
My speakers I believe are clipping... I have 4 Kenwood with a 35 Watt rms rating for each, and a jvc 50x4 headunit that is 22x4 Watt rms I believe. I rewired the front speakers and the back speakers are wired with wire that may be old it has always been there since I got the Jeep. Are my speakers underpowered? any other ideas of why I hear clipping? Thanks
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
My speakers I believe are clipping... I have 4 Kenwood with a 35 Watt rms rating for each, and a jvc 50x4 headunit that is 22x4 Watt rms I believe. I rewired the front speakers and the back speakers are wired with wire that may be old it has always been there since I got the Jeep. Are my speakers underpowered? any other ideas of why I hear clipping? Thanks
What you're hearing is probably not due to being over/under powered, but more likely your EQ (eg. the bass) is too high for the speakers to handle at that volume. Are they one/two/or three way speakers? (separate tweeter/woofer?)
CF Veteran
Joined: Dec 2010
Posts: 1,246
Likes: 1
From: Missouri
Year: 1998
Model: Cherokee
Engine: I6 4.0 L
Originally Posted by dukie564
Do you have the headunit on high power or low power?
What you're hearing is probably not due to being over/under powered, but more likely your EQ (eg. the bass) is too high for the speakers to handle at that volume. Are they one/two/or three way speakers? (separate tweeter/woofer?)
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
I have a JVC head as well and 3-ways. I rarely turn my normal bass above +1 and my adjustable super bass boost (same thing as your "loudness" setting except adjustable) above +1 unless volume is low (below 30).
Basically, whenever you have your volume in the high power range (30-50), turn off loudness or this will happen.
CF Veteran
Joined: Dec 2010
Posts: 1,246
Likes: 1
From: Missouri
Year: 1998
Model: Cherokee
Engine: I6 4.0 L
Originally Posted by dukie564
yea your bass is too high for that setup, and the "loudness" setting should only be used at low volumes (boosts the high and low frequencies). Having the loudness setting on at higher volumes causes the amp to clip much sooner.
I have a JVC head as well and 3-ways. I rarely turn my normal bass above +1 and my adjustable bass boost above +1 unless volume is low (below 30).
Basically, whenever you have your volume in the high power range (30-50), turn off loudness or this will happen.




