Last post on Dec 05, 2013 at 7:03 AM
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Jeep Grand Cherokee, Jeep Cherokee, SUV
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#4000 of 5143 06-08 Power Window Regulator Express Up problems & fix
Mar 15, 2008 (12:57 pm)
I just had both front door window regulators (the power window mechanism & motor assembly inside the doors) replaced at 6k miles in warranty, and while a minor thing it is my first new vehicle defect (hmmm, our 300M went to 35k miles w/o a problem). The power window express up feature was intermittent which I have found handy to use at the mailbox, bank, toll booths and while no big deal to hold the finger on the control like old power windows required, there were a few times it jammed and it took a while to go up even manually forcing it.
I found this data on http://www.wkjeeps.com/wk_tsb.htm#NEW
Jeep owners with 05 and newer models can find a LOT of data on that site including how to do a lot of vehicle simple service and interior panel removals. Scan all the TSBs to see if there are any symptoms showing up you may have. Here is the window express up problem explained:
This bulletin involves replacing both of the front window regulators and both front door modules, if the modules can not be reprogrammed to the proper level.
2006-2008 (WH) Grand Cherokee (International Markets)
2006-2008 (WK) Grand Cherokee
2006-2008 (XH) Commander (International Markets)
2006-2008 (XK) Commander
NOTE: This bulletin applies to WK/XK vehicles built before October 4 th, 2007
(MDH1004XX) and WH/XH vehicles built before October 18th 2007 (MDH
The customer may experience a front door glass reversal, goes up and then comes back down after the express-up function is initiated. This condition is caused by a combination of a regulator motor issue and the sensitivity of the auto up software contained in the door module(s).
#4001 of 5143 '99 jeep cherokee not wanting to idle
Mar 16, 2008 (10:47 am)
I have a '99 jeep cherokee 4.0l. It do not always want to idle when you start it. It started doing it about 6 mths ago and is slowly getting worse. It is not always doing it when it's cold but also when it is warm. It drive and accelerate just fine. Can it be the egr valve? Someone told me it can be the tps censor but it no check engine light.
#4002 of 5143 Re: '99 jeep cherokee not wanting to idle [biddabing]
Mar 16, 2008 (2:18 pm)
The 4.0L and 2.5L engines don't have EGR valves. It could be anything from bad coolant temperature sensor to the TPS. But I'm pretty sure that it's some kind of a sensor.
#4003 of 5143 99 idle problem
Mar 16, 2008 (3:01 pm)
The six has a idle air pump. It is located on the back side of the air inlet body. You may access it by removing the air inlet top housing to expose the air inlet body. Look to the right side of the backside of the housing. Uncouple the wire harness and use a phillips screw driver to release the pump retainer screws. Pull it out and check for any buildup or deposits on the piston. Clean it and reinstall and crank the engine. If it idles you fixed it. If it does not a new valve costs about 50 bucks on the internet. OR----you can take a 1/4" stove bolt nut and place it below the near bottam end of the throttle valve lever( look at the bottam of the front side of the air inlet housing closest to you) Good luck
#4004 of 5143 My story.
Mar 19, 2008 (1:08 pm)
I just replaced the CCV system on my Jeep Grand Cherokee 4.0L. And I have to tell you that it's not easy. First, you have to make sure you have got parts that replace the entire CCV system. The reason for this is that you have to break every thing you attempt to remove. Second, get a large flat head screw driver to pry out the CCV elbows. If you use a screw driver with interchangeable bits, MAKE SURE THAT THE BIT DOES NOT FALL IN TO THE ENGINE!!! Third, you have to take off the resonator to replace the rear hose. If you don't take it off, it will be harder to take off the end of the hose that connects to the intake manifold. This is a good opportunity to check the butterfly valve on the TB. Fourth, install the resonator. Make sure that the resonator is flush with the TB, don't forget to install the hose for the front CCV. Last, triple check everything - the hoses, elbows, resonator, TB. Start the engine and check for a whistling sound (don't be fooled with the whistle like sound of the alternator). If everything checks out, you are all done.
I'm writing this because nobody else has.
#4005 of 5143 2001 jeep grand cherokee laredo
Mar 22, 2008 (6:43 am)
I have a 2001 jeep grand cherokee laredo. About once a month while driving the car seems to slip and the check engine light comes on. The car runs funny after that and the idle races up and down. The code is DTC PO320 . If i disconnect the battery and erase the code, the car runs fine after that, although it still idles a little funny. I really like this car and this drives me crazy. Can somebody help me?
#4006 of 5143 Re: 2001 jeep grand cherokee laredo [tireman3]
Mar 22, 2008 (7:29 am)
On some of the '01s the crank position sensor has been known to fail - I think it was on the 4.7s. Look up the PO320 code. I did some looking it could also be transmission related...
#4007 of 5143 Re: 2001 jeep grand cherokee laredo [blankster]
Mar 22, 2008 (7:43 am)
#4008 of 5143 Re: 2001 jeep grand cherokee laredo [tireman3]
Mar 22, 2008 (11:14 am)
I have a 2000 Laredo in the shop right now for similiar issues. Your code is for the crankshaft sensor. My codes were 1732 and 1784. Which are the presure switch circuit. My Tranny would slip and the MIL would come on. I would reset it with my scanner and all was good. The problem kept getting worse until all i had was 1st, 2nd and reverse. The solenoids and clucthes in tranny are bad. Usually not that expensive, but I had torque converter issues as well. Go to actron.com and look at their scanners. You can link to sites for used ones or check autozone. I just moved to NC from Detroit and before I moved I bought an actron superscanner at Murray's that the employees used on customers cars. It is about $350 new. I paid $86. It has more than paid for itself. The superscanner not only gives you the code but tells you what it is. On top of that you can plug it in while you are drivving and it montors the functions of the vehicle. It also tells you if your car will pass inspection in states that require them. Good luck.
#4009 of 5143 Re: Did I make a mistake buying a Jeep???? [cavman2x]
Mar 24, 2008 (10:13 am)
I currently own a 2001 limited 4.7. I have had no problems that you have stated. I am not a mechanic bu have owned and work on 4 Jeep's in 20 year's. My guess and have had this problem with my 87 commance ( bad power steering pump ) Dealer replaced, no noise. I have had problems with getting things fixed from Jeep dealer's in the past. My advise, go to another dealer. I have a Chrysler/ Dodge dealer that services Jeep. They have been excellent, my last Jeep dealership gave me the run around, didn't fix problems, and charged me for things that should have been covered under my warrenty.Good luck.