Last post on Jun 01, 2013 at 11:25 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, Jeep, Electrical, SUV
#107 of 160 Intermittent Startinf Failure
Sep 17, 2009 (11:55 am)
I am having trouble with my 1993 Grand Cherokee Laredo (Automatic 4.0 with 6 plugs). I purchased this vehicle out of a barn where it had been sitting for a couple of years. I was having trouble starting. I.E. would crank for up to three minutes before it would start. I have since replaced the cap and spark plug wires, spark plugs, the crank sensor on the fly wheel. (Boy was that a treat and thank god for having a mechanic for a neighbor and friend helping me!) After not being able to get it to start for a week straight, I was sitting inside the jeep thinking my next steps. I noticed the computer display panel by the Automatic shifter wsn't set. I set the the time and date, then said what the heck "I'll give it a try." The car started after hearing clicking noises from the relays. I have since then noticed that when I turn the key in the ignition, my jeep does its normal bulb checks and starts fine. Yet if the CHECK ENGINE light does not appear when it does the bulb check in the display panel, it will not start. When this light does not turn on, I do not get fuel pressure or spark to the plug.
#108 of 160 Re: PCM Module Replacement [zdenneh]
Sep 20, 2009 (2:24 pm)
hello, i have the same problem, the pcm is bad and i found one off ebay for $80 check here first and no my boyfriend is a mechanic and he took it out within minutes, the coil is not sparking either but took out coil tested fine but put coil back in tested bad so thats why he said its the pcm hope this helps a little i ordered my 1993 jeep grand pcm but thought you could get any if it comes out of any 1993 jeep grand but boyfriend says i hope its the right one so tomorrow i gues we will find out so if you shop make sure its compatible or the same numbers my numbers we all the same except for the last two not sure if it makes a difference or not til tomorrow.michelle
Oct 12, 2009 (10:40 am)
i have a 1993 jeep grand cherokee wagon w/ 5.2L v-8. security light stays on, climate control display just says error and is non responsive. anyone have any ideas? i can answer any questions about the jeep if you need
#110 of 160 Re: PCM Module Replacement [mercyme6]
Oct 24, 2009 (6:58 am)
be sure that you get the pcm that has a security or non security on it. There are TWO (2) types..If you need one I have one here that I will never use because after much bs from the dealer it just turned out to be the coil...just to be safe replace it not just have it tested..its only 20 bucks at a auto parts store..cheep!
#111 of 160 Starting trouble pattern?
Oct 27, 2009 (2:48 pm)
New to the site. I have a 1994 Jeep Grand Cherokee Laredo 6Cyl/ 4x4. I suspect the PCM but the following has puzzled me. The car starts and runs for 12 minutes and abruptly dies. Restart attempt(s) shows no spark. Strong cranking power, relays energize - but nothing. Three days later the same pattern - starts- runs for 12 minutes- dies and then I must once again wait three more days to hear it run again!! (in those 12 mins it sounds dynamite!)
Car has new fuel pump/ gas tank/ battery/alternator (replaced over time with none of these items over two years old). car has had regular tune ups and oil replaced at every 5K
I think the PCM at fault but I am not to experienced with the many sensors the car has on-board. I wonder if a faulty sensor could be triggering the shut down and hope to lean on someone with more experience before dumping $300.00 on a new PCM
Any help or direction would be MOST appreciated. Thanks in advance for any possible suggestions to resolve my issue.
#112 of 160 Re: Starting trouble pattern? [peteinnh]
Oct 27, 2009 (8:38 pm)
hi, i have a 93 jeep and i replaced my pcm for $80 off ebay motors go there first, it ran great for 2 weeks and then had to replace throttle position sensor at advanced auto for $35 with warranty now the jeep has a temperature problem with starting at certain times so my mechanic says try putting in new spark plugs becuz the older jeeps need certain spark plugs and he thinks the wrong spark plugs are in the jeep now go platinum not the cheapy ones either.hope this helps,having problems too.
#113 of 160 Re: Starting trouble pattern? [mercyme6]
Oct 27, 2009 (8:56 pm)
also found pcm on ebay for you but this is the guy i bought mine off of and i wealed dealed with him he wanted 95 plus shipping so i offered him 80 with him paying for shipping. and he did it.so here is the website to go to,
#114 of 160 Re: Starting trouble pattern? [peteinnh]
Oct 28, 2009 (7:41 am)
hello again, i just got an email from ebay member and he wants to know what your pcm number is, he does have one for you 1994 but wants to know what the numbers are and see if they are compatible here is the ebay guys email
eBay Member: oldtowman"
the other webisite i listed for you is the one i actually bought mine from so here is either one that has a 1994 pcm good luck
#115 of 160 Re: Starting trouble pattern? [mercyme6]
Oct 28, 2009 (7:53 am)
Thank you so very much for this information. I will obtain the info and be in touch with him. Thanks again!
#116 of 160 Re: Starting trouble pattern? [peteinnh]
Oct 28, 2009 (11:21 pm)
I have a 2001 JGC Limited...love it...hit animal and punctured radiator...thank god for comp insurance. Replaced radiator...drove for 20 miles...overheated...fluid pouring out of the bottom. Towed back to the service place...coolant everywhere under the hood. Impellor broke on water pump...coolant backed up in overflow and then sprayed out hose for overflow...replaced everything on the cooling system....driving home tonight...car stalled out....had electrical power to everything.....pulled over...tried to restart....acted as if it was flooded. sat for a few minutes...started up.....Drove another 20 miiles....same thing...tach to zero....had electrical power.....restarted right away....while driving again it jerked and a few minutes later...stalled out. Had got gas and thought it was bad gas....filled tank and added dry gas.....droveit all the way home...stalled pulling in driveway. It acts as if it is not getting enough gas.....any thoughts?