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Jeep Cherokee Grand Cherokee Engine and Performance Problems

729 messages,  Last post on Mar 20, 2013 at 10:59 AM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum.

What is this discussion about? Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, Jeep Cherokee, Engine, SUV

Messages Page 65 of 74

#636 of 729 2001 jeep grand cherokee timing chain problem by khullinger

Feb 01, 2011 (10:07 am)

I am working on a 2001 Jeep Grand Cherokee with the 4.7L engine, I had the heads off because of the vehicle overheating and had the heads milled and all valves and seats replaced, while into the engine I replaced the timing chains and guides, now I can't get it set up right, I keep bending the intake valve on cylinder #1 and I don't know what I am doing wrong, I have all the timing marks lined up according to my information from jeep, with the crank marks at 12 and 6 o'clock and the cam sprockets lined up with the L on the the left side and the R on the right side, then after rotating the engine 2 revolutions the v8 marks are at 12 o'clock and the crank is at 12 and 6 o'clock, but I still bend the valve, any suggestions on what i am doing wrong?

#637 of 729 Harryenglsh by harryenglsh

Feb 03, 2011 (11:05 pm)

My 1994 jeep Gr. Cher. Loredo starts but will suddenly die. there is no fuel pressure at the fuel rail. Sometimes it will start after a while. Very intermittent issue. Not convinced it is the fuel pump b/c the pump makes the right sound when ignition is turned on.

#638 of 729 Re: Harryenglsh [harryenglsh] by tht828

Feb 04, 2011 (4:01 am)

Replying to: harryenglsh (Feb 03, 2011 11:05 pm)
Since the problem is very intermittent you could have something that is being sucked up and clogging the pickup tube or fuel screen of the fuel pump. After the vaccuum bleeds down the object falls odd and allpws the fuel tankin the gas tank. After the vacuum

#639 of 729 Grand Cherokee, '07, 3.7v6 by rbwb

Feb 07, 2011 (5:22 am)

Does any one know where to go from here. Misfire on #4 (P0304), have replaced plugs, coil and fuel injector. The after erasing the code, it came back, erased code again. Code stayed off for two weeks then came back. Replaced one plug at #4, swapped coil, run inhector cleaner through and erased the code. Code came back on the next day. Erased code, copde came back on within two weeks. What now?

#640 of 729 Re: Grand Cherokee, '07, 3.7v6 [rbwb] by tht828

Feb 07, 2011 (5:51 am)

Replying to: rbwb (Feb 07, 2011 5:22 am)
Had a similar intermittent problem with my '04 4.0. Turned out to be a bad wire going to the fuel injector. Seems I over stretched the wire while changing the coil rail. Drove me crazy for until I took it to the dealer.

#642 of 729 some jeeps sluggish and some not. by finest018

Feb 08, 2011 (4:20 am)

Hello, I recently purchased a 2008 grand Cherokee 4x4 Laredo. I noticed that it is very sluggish. It takes a lot of effort to accelerate the vehicle. About a week later I had to drive a loaner car while I had something fixed. The loaner car was the exact same model just 2 years older. It was 2 identical cars but the loaner car was not sluggish at all. If you step lightly on the has the car would move fast. Why the difference?

#643 of 729 Re: 2011 Hemi hesitation/misfire problem [halo2] by deeceesd

Feb 14, 2011 (11:06 pm)

Replying to: halo2 (Jan 29, 2011 10:11 am)
Sorry for the delayed update.. I finally met with Chrysler west coast dealer rep and engineer who went for several rides and recorded data on the engine performance. Bottom line is that the hesitation / fluttering is not the engine according to the test results. Instead, they "believe" it may be a bad torque converter that is causing the problem. I'm scheduled to have that part replaced later this week. The saga continues....

#644 of 729 Re: 2011 Hemi hesitation/misfire problem [deeceesd] by halo2

Feb 15, 2011 (10:06 am)

Replying to: deeceesd (Feb 14, 2011 11:06 pm)
Thanks for the update---Will be looking forward to hearing if the fix worked.

#645 of 729 Re: Copy of Tech Ser Bulletin for electronic transmission control module? [myjeepy] by wolfcat244

Feb 22, 2011 (3:24 am)

Replying to: myjeepy (Dec 01, 2009 11:24 am)
i have had the same problem. I bought my jeep in august, had about 30000 miles i got extended warranty i had it three months when it started to act up. it would not start and had the trans over temp message. then it worked fine. one day it would not. had it towed and dealer said it was starter. worked fine for 3 more months. it did it again on thursday but started. worked fine sunday and would not start sunday night. had it towed again, the dealer now said it is a module that will cost me $650 because it is not covered under the warranty i purchased. i now have 35500 miles on it.

Messages Page 65 of 74

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