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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 69 of 74

#677 of 729 Re: 1994 Grand Cherokee dying while driving [guertin] by mechman86

Oct 14, 2011 (8:27 pm)

Replying to: guertin (Nov 21, 2008 9:03 pm)
Well first things first...you want to start with the most basic, most importantly, cheapest things first. (I just realized how old this post is...lol...still) If the fuel pump goes out it won't crank at all...you can turn the key to the ON position just before trying to start it. You should hear the fuel pump kick on for just a sec or two at the rear of the vehicle (it is at the top of the gas tank). In the fuel system I would start with the fuel filter first. People would be amazed to know the types of problems which can be caused by not keeping up with regular maintenance of a vehicle (changing the oil and oil filter, changing the fuel filter, changing the spark plugs and spark plug wires, chainging the air filter.) I had a 1994 Jeep Grand Cherokee with the inline 6 cylinder engine. Very simple cars to work on. Its system does not have things such as a throttle adjustment screw...if it is not idling or running correctly start with these minor things first (according to the symptoms of the issue you are having...starting system, etc...). You have to drop the gas tank to get to the fuel pump on these vehicles...its not that difficult but a new one does cost about $300. Had to do this on mine while I owned it. These tips can be used with almost all vehicles...they are all very similar. Except for CHRYSLER!!!! Steer clear of those!!!! lol. My wife owns a 97 Sebring and it has given me and all mechanics I know more problems than any vehicle.

#678 of 729 Re: 1994 Grand Cherokee dying while driving [mechman86] by maryanne1996

Nov 01, 2011 (10:42 am)

Replying to: mechman86 (Oct 14, 2011 8:27 pm)
my 1996 gc laredo w 218.000 miles has been dying while driving or coming to a stop. The oil pressure dropped to zero just before. No "check engine light". I could restart it immediately dropping into neutral while coasting along. this worked good on freeways but it's stressful to say the least. Have had my mechanic replace coolant sensor, temp sensor, crank position sensor & new battery & belt. Display kept showing "bad coolant sensor. Then it wouldn't start. Finally took it to jeep dealer who replaced plugs & wires, cleaned distributor, new gasket on valve cover for $700. Said they wouldn't reset the computer module. After driving it for 4 hours and about 300 miles running just great it up and dies again, once when stopping, then when underway. Jeep dealer says it needs a new PCM & ignition coil for another $1000. Hate give up this car as it goes anywhere and is a joy to drive, but is it worth it now? Anyone with any more ideas?

#679 of 729 Jeep dying by b_web

Nov 01, 2011 (12:21 pm)

I just went through this with my 94 JGC. I did all the same things you did. It did end up being the PCM. Once the PCM was replaced for $500 I have had no issues. When you think about it, it makes sense. It is a very old computer, how long is it supposed to last. Mine was in bad shape when they pulled it off. It also corrected my hard starting problem. Good luck.

#680 of 729 Re: 2011 Hemi hesitation/misfire problem [halo2] by 11ovrlnd

Nov 04, 2011 (12:03 pm)

Replying to: halo2 (Jan 09, 2011 7:29 am)
Hi...did you ever get a fix for your misfire issue? I have been returning mine for updates and checks for this for 10 months. Finally pulled spark plugs myself and found two cylinders appearing to burning very lean and a couple others looking rich and some indications of oil going through them. Finally got call from Customer service and was told no codes so no problem!!!!! Informed her that issue showed up after about 3,000 and was minor annoyance but has continually gotten worse. they did not care..no codes, no problem was the set "line". Email me if possible and let me know? daboothselectca.com

#681 of 729 Re: 2011 Hemi hesitation/misfire problem [11ovrlnd] by halo2

Nov 04, 2011 (1:34 pm)

Replying to: 11ovrlnd (Nov 04, 2011 12:03 pm)
No--Finally had the factory tech come in an drive it--he said that the hesitation is a normal function of the multi displacement system that switches between 8 cylinders and 4. He said to over ride it put it in 5th gear or push the tow haul button. That works some, but I should not have to do that. I love everything about the jeep gc except the hemi with MDS. I'll guarantee you that the next one I buy will not have the Hemi in it.

#682 of 729 New Engine? by toronto2

Nov 10, 2011 (10:57 am)

I have a 2000 Jeep Grand Cherokee 4.7 litre V8 engine and have had it in the shop and have been shopping around for a rebuilt engine at the request of the mechanic I use. When the problem occurred the temp gauge maxed out twice then it started making a clanking noise so I pulled over and had it towed to my garage.The mechanic said it would be less expensive purchasing a rebuilt motor for it rather than spending the time finding what the problem is and then fix it.Any resemblances or suggestions would greatly help ( my pocket book also)

#683 of 729 Re: 2011 Hemi hesitation/misfire problem [halo2] by 11ovrlnd

Nov 10, 2011 (11:21 am)

Replying to: halo2 (Nov 04, 2011 1:34 pm)
Unreal...the last time mine was in (about 2 weeks ago) they told me this was a combination of the MDS, the torque converter locking and unlocking and how lean they were running the engine. NO ANSWERS as to why it was not present when new nor any explanation as to why it has gotten worse.
 
NO WAY a "premium" vehicle that we paid money for should run like this. I could have purchased a 10K little puddle jumper that would not run like this. I am extremely disappointed with this running issue on this vehicle...it makes it worse that I love the looks, drive and features but will likely not buy Jeep again.

#684 of 729 95 GCL ltd 5.2 v8 won't start until relays stop clicking by eperkins

Nov 11, 2011 (7:43 pm)

My 95 Jeep has a weird issue. the only way to start it is to turn the key to on position and wait until the fuel pump and auto shut off relays start clicking and then stop. Once the relays stop clicking it will start. I can shut it off and immediately restart but if i leave it off for more than a few minutes i have to wait until the relays start clicking and stop again before it will start. I notice if i leave the battery terminals off and let the computer reset this process doesn't take as long...any ideas?

#685 of 729 Re: 95 GCL ltd 5.2 v8 won't start until relays stop clicking [eperkins] by b_web

Nov 12, 2011 (12:27 am)

Replying to: eperkins (Nov 11, 2011 7:43 pm)
I had the exact same problem with my 94 JGC. After replacing every sensor under the hood and my fuel pump, the result was the computer. After I replaced the computer it ran like new and it fires right up even in cold weather. Good luck.

#686 of 729 Re: 1994 Grand Cherokee dying while driving [maryanne1996] by therealsteveo

Nov 24, 2011 (7:08 pm)

Replying to: maryanne1996 (Nov 01, 2011 10:42 am)
Just fixed mine after trying foreever to fix it. It was the idle control motor. Has not been a problem since. They cleaned it and works great. 100 dollar fix

Messages Page 69 of 74

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