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XJ Ask the Question Thread
#2776
☠ CF Sheriff ☠
You're probably not getting the best gas mileage with it running that cold either.
Is it throwing any engine codes?
#2777
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Join Date: Jan 2011
Location: North Port Florida
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Year: 1990/1993
Model: Cherokee
Engine: 4.0 HO
Originally Posted by goldenlandscaping
do you have any suggestions because you are the only one that says that this wont work
#2778
Newbie
Join Date: Dec 2010
Location: Alpine, CA
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Year: 1996
Model: Cherokee
Engine: 4.0 HO
hey i have a 96 xj and i am getting a clunk in my drivetrain when im driving in 4th and overdrive (aw-4 trans) and i am told it is my transfer case, and that something may be loose in there. are transfer cases easy to work on? any similar problems? could different fluid or lucas help? thanks
#2779
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Join Date: Jan 2011
Location: Lansing, MI
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Year: 92 abd 98 XJ
Model: Cherokee
Engine: 4.0
Ive been thinking. How long would an XJ last with front and rear (correctly) welded diffs if wheeled off road only, no rocks. Say 31's budget 3" lift. Just looking for generalites here. And yea. I know all about the positives and obvious negatives and how cheap lunchbox lockers are.
Ninja edit. I put this in the wrong thread. Oops. Any moderators wanna move it.
Ninja edit. I put this in the wrong thread. Oops. Any moderators wanna move it.
Last edited by bravododger; 01-15-2011 at 02:26 PM.
#2780
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Join Date: Jan 2011
Location: Gainesville, GA.
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Year: 1989
Model: Cherokee
Engine: 4.0l
Crank shaft position sensor voltage
I have an 89 cherokee 4.0l that won't crank sometimes when temperatures get below 20 deg or so. Using a timing light connected to a spark plug wire it either doesn't indicate any fire to the plug or is intermittent. Once if finally cranks it will re-crank just fine. I tested the Crank Shaft Position Sensor using a procedure for RENIX engines I found on this site. The resistance of the sensor is 190 ohms which is pretty much in the center of the range. The voltage when cranking the engine over is 0.3 Volts. According to the procedure it says the voltage should be between 0.5 and 0.8 volts. It says if it is less than 0.5 volts to replace the sensor. My question is, Will the low voltage cause the cranking problems only at very low temperatures? I don't want to replace the sensor, then retest the new one and find it also measures 0.3 volts and still have the same problem.
#2781
CF Veteran
Join Date: Dec 2010
Location: Frederick, Maryland
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Year: 1996
Model: Cherokee
Engine: 4.0 I-6 High output
It is low. Is this when fully warmed up (10-15 minutes of driving)? It's possible someone installed a 160* thermostat in your jeep at some point. Not the best idea for a colder winter state. I would go the route of replacing the thermostat with a stock 195* one. If the cooling system is operating properly this should be perfect. Cherokee's like to run about 205* in the summer, about 190* in the winter.
You're probably not getting the best gas mileage with it running that cold either.
Is it throwing any engine codes?
You're probably not getting the best gas mileage with it running that cold either.
Is it throwing any engine codes?
Very true my gas mileage is not very good, not sure exactly how bad yet though.My heater takes forever to heat up also.Do you think that is why, or should I flush the heater core?
I do not have a code reader,sorry newbie here. I think my buddy might though.
#2784
Newbie
Join Date: Oct 2010
Location: North Carolina
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Year: 2001
Model: Cherokee
Engine: 4.0 Milled Head, Stroked
The belt tension is right. I am checking to make sure all the pulleys are lined up now. Maybe this is the problem. Thanks for your help.
#2785
Newbie
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Year: 1999
Model: Cherokee
Engine: 4.0 six cylinder
I just pulled out the starter, replaced it with a new one, getting 12.3 V on both the battery and starter yet the starter still wont crank, any suggestions as to where I go from here thanks,
Dexter
Dexter
#2786
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Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by kgbigwheels
I just pulled out the starter, replaced it with a new one, getting 12.3 V on both the battery and starter yet the starter still wont crank, any suggestions as to where I go from here thanks,
Dexter
Dexter
#2790
New Cherokee owner
Thanks for providing a place for rookie questions. I recently bought an 01' Limited, 4.0L, Auto, leather interior, all stock.
It idles at 600-650 RPM (via dash gauge). Is that low? What's the correct number?
I have a rattle that I can't find. It doesn't rattle if I give it a little gas and get the RPM up to 700-750. So I'd like to fix the RPM...if it's out of range...and then pretend the rattle never existed.
The searches on the Forum yield a ton of posts to sort through. Is there a top 50 or 100 thread list?
EDIT: One more concern - I have a "whine" above 15mph. Sound's like a wheel bearing but a higher pitch. I put her on a lift and the wheel bearings are tight. Front and Rear diff level's are good. Of note - Tranny seems to be 1/2 - 1 quart HIGH on fluid. Would this cause the sound? My plan is to pull the diff cover and inspect. The rig has 138K and the U-Joints look to be original.
When I put it in 4wd and turned the wheel the truck hopped quite a bit. I was in a parking lot (I know that's a no no but I wanted to check) and I only had it in 4wd for 100yds.
Lastly, Is there any way to take control of the ECM and smooth out the fuel curves?
Thanks in advance,
Mike
It idles at 600-650 RPM (via dash gauge). Is that low? What's the correct number?
I have a rattle that I can't find. It doesn't rattle if I give it a little gas and get the RPM up to 700-750. So I'd like to fix the RPM...if it's out of range...and then pretend the rattle never existed.
The searches on the Forum yield a ton of posts to sort through. Is there a top 50 or 100 thread list?
EDIT: One more concern - I have a "whine" above 15mph. Sound's like a wheel bearing but a higher pitch. I put her on a lift and the wheel bearings are tight. Front and Rear diff level's are good. Of note - Tranny seems to be 1/2 - 1 quart HIGH on fluid. Would this cause the sound? My plan is to pull the diff cover and inspect. The rig has 138K and the U-Joints look to be original.
When I put it in 4wd and turned the wheel the truck hopped quite a bit. I was in a parking lot (I know that's a no no but I wanted to check) and I only had it in 4wd for 100yds.
Lastly, Is there any way to take control of the ECM and smooth out the fuel curves?
Thanks in advance,
Mike
Last edited by Hoosier; 01-16-2011 at 06:43 PM.