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Jeep Grand Cherokee
#442 of 1068 93 Jeep GC starts rough then dies check engine light is on...
Feb 07, 2009 (11:25 pm)
I have a 1993 Jeep Grand Cherokee with a rebuilt engine in it there are about 20,000 miles on the new engine and just turned the car over 249,000 the other day. Last week the water pump and the fuel pressure regulator were replaced and about a month ago i replaced the battery cables (and yes the whole wiring harness battery cables not just the ends). And now after the water pump was replaced the check engine light came on accompanied by a rough start. The engine turns over and over and over and then finally starts up soon to die with a jolt and a shake. It does this a few times until it stays running for a little bit longer then finally after about the fifth time i try to start it the car finally stays running. But it is idling rough and once i put it in drive it dies again. To make a long story short I finally get it running but just today it started to back fire while driving (we all know thats not a good thing) and it's having trouble finding the right gear to get optimum performance. PLEASE somebody tell me what the hell is wrong with this gd stupid POS! I don't want to put in a bunch of money to fix it being that it is only worth $700 I just want it to work and not die on me.
By big red needs some serious medical assistance so please reply if you know whats going on with her.
#443 of 1068 Starts Hard When Warm
Feb 09, 2009 (2:42 pm)
I have a 2001 JGC laredo V8 auto, that I just got,here's the problem, It starts great when cold but when it runs for a while and I shut it off and wait about 45min to a hour it starts hard ( Have to crank for around 10 12 seconds is this normal ) have to crank it longer then I did when it was cold sometimes longer then others, I changed the plugs, no distribitor or rotor. I get from reading in the forums it sounds like it might be the Crankshaft Position Sensor? Changed the CPS seems to run smoother but still starts hard when hot What if the battriey is smaller the the orignal? Thanks
#444 of 1068 Re: rough idle after startup 
Feb 10, 2009 (3:20 am)
I to have a 2001 JGCL with the same problem, I know this a old post but did you ever resolve the problem?
#445 of 1068 Re: 93 Jeep GC starts rough then dies check engine light is on... [mypos]
Feb 11, 2009 (7:11 pm)
not sure but heard that other people had the same prob, eventually the head gasket blew out on theirs and turned out was a warped head that just finally gave way...good luck
#446 of 1068 Re: Ignition switch doesn't work [tripper1]
Feb 22, 2009 (6:45 am)
tripper, did you ever figure out what the problem was? My Jeep is doing this as of this morning.
#447 of 1068 2000 Grand Cherokee Limited 4x4 4.7V8 Stalls
Feb 22, 2009 (3:44 pm)
I've read most of the posts and nothing quite like this one. My GC stall at highway speeds, 20 miles per hour and even stop. Just stops when it want too. No codes in the system. I've changed the CPS as many people indicated that item was a common problem, new battery, cleaned the grounds, new battery terminals, 3/4 tank of gas. The dealership said I needed a new "brain" before they could trouble shoot it, because for some reason it would erase all codes whenever this problem occurred.
One thing I have not seen mentioned is after mine stalls, you sit for maybe 1 or 2 minutes and each time you try to start it, it will crank, no start, but the fuel gage is reading below zero. The rest of the lights and gages work per normal at that point. Now after awhile when you turn the switch on, the fuel gage registers the 3/4 tank and it will always start right up!
When I first drove yesterday after all the stated repairs, it ran fine for the first 15 miles, then quit about 8 times over the next 6 miles getting home. It alway starts after the fuel gage starts registering and has never failed to start. It is those honking horns at the light that get me..ha.
Some one told me that the GC fuel gage ground was thru the ECU or PCU don't remember which, but I assume they mean the main "Brain".
Even the manual code reading of turning on the switch 3 times only gets "done" code, nothing else.
Also, not sure if this is realated but I get some beeps after the seatbelt warning etc. The last thing is two series of 3 beeps. Very distinctive beeps. Always 3beeps and short pause and 3 more. Ik can't seems to find anything about these beeps.
Anyone have a solution to either of these problems? My next step is replacing the ECU, the local parts place needs the vin, mileage,etc so they can flash it before sending it to me. Anyone had any luck changing the ECU?
Thanks for your assistance.
#448 of 1068 Re: Jeep Stalling problem. [hondajeep95]
Feb 22, 2009 (4:00 pm)
Did you ever solve this entirely? Are you using the AC yet? My 2000 JGC Limited 4.7 got the same review from the dealer. Said the computer was not storing the codes and every time it quit it would reset itself.. I said adios too but have not solved the problem yet. ORiley's auto parts call the computer the ECU and is available for $145 or so. I'm about ready to try one I thing, mine quits 6-8 times in 20 miles. Gotta limp home. It alway starts after a couple minuted. BUT only after the fuel gage begins to register. If the fuel gage does not come up, it will crank but not start. Wait another minute, the gage registers, and it always starts. I did not have my AC turned on the other day and it still quit 5-6 times.
Hope yours is fixed.
#449 of 1068 Re: 2000 Grand Cherokee Limited 4x4 4.7V8 Stalls [texgking]
Feb 22, 2009 (4:20 pm)
i would check the fuses under the hood by the battery as i you lose power to the computer will erace the codes could just be croded contacts also i would just plug and unplug the ecm a cople times and see if that takes care of prob.
#450 of 1068 Re: 2000 Grand Cherokee Limited 4x4 4.7V8 Stalls [tuggajb]
Feb 22, 2009 (4:27 pm)
Thanks, I will try that before ordering one. Seems several people have had bad wires, bare wires etc in and around this item, mine seems quite clean, but you never can tell. I will pull it out and look closely for sure.
#451 of 1068 Re: 2000 Grand Cherokee Limited 4x4 4.7V8 Stalls [texgking]
Feb 22, 2009 (6:25 pm)
the pcm sets right in front of your coolent tank
the wires that go into it are held in with a long bolt in the middle under the first cover you see what i did was loosen the bolt and unplug and plug in cople times then reassembled it took care of prob REMBER TO UNHOOK YOU BATTERY BEFORE DOING ANYTHING