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Jeep Cherokee Grand Cherokee Engine and Performance Problems



  • I also have a 2004 jeep grand cheorkee limited I brought used in 2009. Six months later I had to replace the engine. And now 7 months later my engine light came on reading a misfire in cylinder 7 i took it back to the dealership I purchased it from who also replaced my engine at my exspense of course. It's been there almost two weeks and they have yet to tell me whats wrong. From the reasearch I have done I think it's my head gasket too. I am waiting to get a confirmation of that and than I am going to do more reasearch because something is not right with this suv, I have had it one year 9 months and I still owe on it. Something is just not right. What did you find out about your issue?
  • sgonzasgonza Posts: 1
    edited October 2010
    my jeep needs an engine according to mechanic. It overheated and apparently there was no water in radiator. Its frozen. first of all hes charging me 1,800 to replace engine.Prior to this the computer kept stating coolant engine low. I would put water in it. Then it would say coolant sensor bad. It had been saying this for months now. I would put water in it. It was also dripping water from bottom, but i kept putting water in plastic container that connected to radiator. Thats when it broke down on the freeway. My husband told him to take as long as it takes. Has anyone had this done and is the price reasonable and how long should the duration be for repair. any advice. I would appreciate it!!!
  • First after checking and replacing all normal PM parts, Fuel Filter, Plugs, Cap, Wires AND AIR FILTER, if this does NOT cure the hi-load sluggishness, its your Catalitic Convertor. Replace it - or eliminate it.
    Best test - most economical - is to disconect eahaust engine side of convertor and go do your hill climb.
    Gonna be a bit noisy but if this cures it your Convertor is what is called BLINDED - Plugged.
  • I changed the oil put in 20w-50 after that i noticed the first 15 min of driving the oil pressure shot up to 80psi after 15 min the oil pressure is normal so I changed the oil back to 10w-30 put in a k&n filter and it still does it, could I have messed up the sending unit or is the oil relief valve stuck I had a new oil pump installed 2 yrs ago
  • I am not positive about the 94 model, but on the 95 there is no EGR on the 4.0.
  • I just got through putting a rebuilt engine into my 95 Grand Cherokee and found through lots of frustrating trial and error that the 4.0 will run marginally with the distributor a tooth off. This is due to the tip of the rotor being about a half inch long and the timing being controlled by a delay or advance in the firing of the coil. The thing is, when the spark advances too much (at around 3000-3500 RPM) the spark fires to the wrong post on the distributor. This causes major backfiring and a loss of power. While trolling for answers on the internet I found several posts that said that it would not run if the distributor is a tooth off, so I figured that this tidbit of info would be handy to post.
  • Hi. Got the Jeep from my dad. He apparently had problems with the driver door, because it looks like the bottom hinge has been re-welded back onto the door itself. Now, the weld has broken off, and the door doesn't close all the way. My husband had to take the bottom pin out of the hinge, just to get the door to drop into place. It still does not close all the way, but now, the interior lights stay on. I have taken out the fuse for the interior lights, but the console reading lights, and middle console light stays on. Aside from disconnecting the battery, which I have done, how can I get the lights to stay off so it doesn't drain the battery? I am afraid to open the door again, for fear of not getting it to latch so I can use it for transportation. Any suggestions would be greatly appreciated!!
  • Good Evening:
    I'm looking for some assistance with the above codes. They are the result of the Electronic Throttle Control warning and check engine like coming on. I've been able to reproduce the codes and warnings with hard acceleration, but also with steady city cruising.
    I've reset the codes, numerous times, and also had the codes and check engine light reset themselves!
    I've run fuel dryer, and fuel conditioner twice, because i thought I picked up a tank of bad diesel, without results. Latest has been to replace the fuel filter. The codes apparently refer to high and low pressure at the solinoid on the fuel rail. Of course Chrysler won't just sell the solinoid and would prefer I spend $1000 for a new fuel rail.
    Has anyone run into this issue with the diesel?
    your assistance is appreciated.
  • halo2halo2 Posts: 11
    Recently bought a 2011 Grand Cherokee Limited---between 30-65 mph while maintaining speed or slightly accelerating, engine misfires/hesitates frequently. Service Dept can't find anything wrong---service manager rode with me and felt the misfires---he stated that it had something to do with the cylinders shutting down to save gas and then firing back up for more power. Maybe so but this should not be doing this as much as it is. terribly annoying after I spent so much money on it. Filed complaint with Jeep customer service in detroit. they contacted the service manager who rode with me. they can't do anything unless they find something wrong on the computer---This is nonsense---Something is wrong with this hemi engine and probably with others---anyone else experiencing this problemChrysler customer service
  • halo2
    Thanks for the post. I am having the same problem with my 11 GC Limited 4x4. Service dept didn't admit there was a problem when I returned it within the first week of ownership back in early Oct. I've finally got them to admit there is a problem but they can't figure out the reason or how to fix it. They are waiting for Jeep Engineers in Detroit to get back to them. Glad to see I'm not alone with this issue... I hope Chrysler stands behind their product!!!
  • halo2halo2 Posts: 11
    Since I posted this-- I drove a new one at a dealership and it is doing the same thing-----I then took it to a small town dealership and the service manager rode with me and felt the hesitation---He went on the computer and found a company tech notice that described the problem to a tee. the fix was to re boot the software in the jeep computer with a fix. they tried but found that it had already been done, which I was never told about. It did not fix it. My jeep has a serios heart problem and his is continually skipping a beat. the service manager at the small dealership stated that the diagnostic computer will not find software issues, just mechanical. Chrysler better get a fix---I am very close to making a lemon law claim---This is my 4th Jeep---This 2011, I love everything about it except the engine issue. Please keep me posted.
  • During the recent check they did take a look at Service Bulletin # 21-004-10 Rev A which I was hoping, like you, would fix the problem. Unfortunately, I was told the same thing. The DTCM software and flash reprogramming had been done as well with no improvement. I have made three visits so far to Jeep dealer who sold me the vehicle... Not sure if I should try another Service Dept to see if their techs are any better. Thanks for the update and I will keep you posted on my progress, if any.
  • I am having the same problems with the gargling/sloshing of coolant from behind the passenger dash/glove compartment. What did you find out was the cause? Thanks.
  • Anything new on your issue? I have Overland w/hemi and found when new the miss was noticeable but after having the updates, I believe it is actually worse and is constantly getting worse. About 9,000 Km on it now. It has been back three times and no answers. My belief is that there is not a fix for this issue and dealers are just trying to put people off untill Chrysler comes up with the fix. First time in dealer told me it needed the updates, second time they said it was just because it was going into ECO mode and this last time, no explanation as of yet except to say they may hook up scan tool that I will drive with for a couple days so they can see what is I said, stall tactics untill a fix come from Chrysler. It feels like a fuel mapping issue IMO. Definitely not just when going into eco mode as I can get engine to miss while loading it up with brakes on fully (not moving) to 1300 - 1500 RPM, No way the system would be trying to go into ECO mode under this circumstance. Only recourse is for all to demand a fix from their dealers and if unable, then get in touch with Chysler and screem. These are great looking, great driving vehicles they have come up with but no way anyone should have to put up with this issue on a vehicle we paid a good amount of money for.....We could have a 10,000 fing Hyundai that would not have this running issue.

    All...keep posting info on these forums and push dealers and Chrsyler for the fix. Just my 2 cents!! DB
  • I had a blown head gasket
  • DB
    Thanks for jumping in with your situation. I've been back to the original dealer who sold me the vehicle and now a second Jeep dealer with similar results and stories from the dealers. They are now trying to give me the same story that it relates to the EDO mode function. I will be talking to Chrysler rep tomorrow to voice my displeasure. As you mentioned, we paid serious bucks for this brand new vehicle and it is totally unacceptable to have this constant fluttering/hesitation. New Jeep GC 2011 buyers beware...
  • DC,

    Please let me know what the Chrysler rep had to say to you about this. Mine is scheduled to go back in on Tuesday the 25th. I have told dealer in no uncertain terms that I want answers....whether or not it does any good I will see. Even if Chrysler would just own up and say there is an issue they are working on, it then wouldn't bother me near as bad.

    On another note...have you checked your front tire wear? I found feathering on the front tires starting around 3,000KM. It was to be checked last time it was in and they indicated alignment was NOT in spec in "Auto" mode (which is the default ride height setting) but when they switched it to "sport mode" it came into specs. I screamed bloody murder at them for this also and they are suppose to have answers regarding this also. Makes no sense to have alignment specs set in "sport" mode which lowers the ride height a bit especially when the default setting is in "auto".

    Thanks for the reply and look forward to reading what the rep told you about running issue.

  • halo2halo2 Posts: 11
    I went back to the dealership and service advisor said they had no other complaints. One of the mechanics was sitting there and he told me that it was difinitely the MDS system and there was no fix for it at this time. I have done a lot of research and there are a lot of blogging about this issue in all Chrysler/ Jeep/ Dodge vehicles with the Hemi MDS system I f you put it in tow/haul mode it will turn the mds off. I tried it and it seamed to work---but as we know I shouldn't have to do this. Also, they are saying that Jeep service can turn the MDS system. Apparently it will affect gas mileage a little. Bottom line, I am going file an official complaint under my states Lemon Law and see what Jeep says. Please let me know what you find out.

  • Filed a request for a Lemon Law buyback through Chrysler Customer Service last Friday. Received a call from Chrysler Regional Dealer Rep on Tuesday and again today. Asked to set up appointment to drive the vehicle next Wednesday. Thanks for passing along the latest information on the MDS. I'll give it a try tomorrow. I'll let you know how it goes next week and please post any new updates on your situations. Together maybe we can finally get to the bottom of this problem since it seems at least the dealers are still in denial there is even a problem.
  • halo2halo2 Posts: 11
    I have not filed yet--let me know what he says---I really dont want a buy back--just want it fixed---but will do it if I have to---Thanks for the update
  • khullingerkhullinger Posts: 1
    edited February 2011
    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?
  • 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.
  • 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
  • rbwbrbwb Posts: 1
    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?
  • 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.
  • 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?
  • 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....
  • halo2halo2 Posts: 11
    Thanks for the update---Will be looking forward to hearing if the fix worked.
  • 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. :mad:
  • I also have a terrible "hesitation" in my 2011 GJC. Its was manufactured 8/10, and I've now taken it in twice and the dealer insures me they have updated it for the flash update. It still does the exact same thing... low speed hesitation and then a quick surge. Pretty sad, especially in snow or wet conditions. Has anyone had any luck with a fix?
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