Last post on May 01, 2013 at 6:01 AM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee
#889 of 1068 Re: 1999 jeep grand Cherokee Laredo 4.0L 6cyl [nfsouthworth]
Oct 28, 2011 (6:28 am)
This reply was for an earlier discussion but it applies to your problem as well.
Mine was having the EXACT same problem (1999 Jeep Grand Cherokee Limited 4.0). I replaced the fuel filter, MAP Sensor, Crank Sensor, Spark Plugs, O2 Sensors, Catalytic Converter...it turned out the problem was a bad fuel injector. Fuel injector on cylinder 3 was sticking. My friend is a mechanic and he replaced the fuel injector for me. It's been running spectacularly since.
Take it to AutoZone to have them pull your engine codes and see if you are getting a cylinder misfire code. If so, it's going to be your fuel injector giving you the problem. Good luck!
#890 of 1068 Re: Random engine shutdowns while driving [veddy]
Oct 31, 2011 (8:11 am)
i'm having this same problem and the mechanic can find no errors on the "computer". mine starts everytime but just loses power without warning. seems like it always early in the morning or early in a trip. after driving out on the highway for a few miles, with the jeep warmed up, it won't do it. it won't do it for the mechanic either!
#892 of 1068 one fix for the stalling problem
by steve_ HOST
Oct 31, 2011 (12:10 pm)
From Edmunds Answers (scroll down to the bottom):
1997 Jeep Grand Cherokee Laredo stalling problem
Apparently some web site is selling this information on the net and YouTube for $20, when the spacer fix has been around for a while on the net for free.
#893 of 1068 Re: 1999 jeep grand Cherokee Laredo 4.0L 6cyl [nfsouthworth]
Nov 03, 2011 (6:28 pm)
figure it out yet? I am having the SAME problem. my mechanic replaced the starter a while ago because the pin was sticking. still wouldnt crank right up. then it started dying on me while driving and the crank problem persisted. he checked the fuel pump - psi 20 - replaced it 2 days ago. still having crank problems and died on me while driving down the road twice today
#894 of 1068 Re: Grand Cherokee- Idle issue [alby3]
Nov 09, 2011 (2:30 pm)
Which eBay reseller did you buy your PCM from? I've read mixed reviews on the rebuilt PCMs from eBay resellers. There's two with lifetime warranties. All Computer Resources and Auto Computer Exchange. The latter gets crap reviews but there's really nothing on ACR. How's the car running now?
#895 of 1068 Re: Grand Cherokee- Idle issue [kramer842]
Nov 10, 2011 (11:39 am)
sorry do not remember. The car ran great as soon as i plugged in the rebuilt one..... what an easy install too.... supposedly there are no new ones.... only rebuilt.
#896 of 1068 Re: Grand Cherokee- Idle issue [alby3]
Nov 10, 2011 (12:28 pm)
good to hear the rebuilt off ebay is working well for you. turns out even mopar isn't making new pcms. only remans and charging $682! And NOT programmed. 3rd party resellers like on ebay are charging $200 fully programmed. just need to find one you can trust. if you recall who you got yours from, please post. thanks!
#897 of 1068 Re: 97 G C 4.0 Intermitant stall. !!! [alby3]
Nov 14, 2011 (11:14 am)
Hey everyone, had all these stalling, intermittently, and bad idling just like all you all. I am so broke I can't pay attention but anyway here was my fix. Two hex screws hold the PCM module under the harnesses, and these according to a airplane mechanic who was an angel of a man to troubleshoot this and let me know. These screws are too long and cause some kind of short. I put spacers on screws($0.10) to make them about half as long and stalling stopped this was around two months ago. I also had an tension pulley replaced cause the belt was jumping and causing a stall. It looks great and a cheap fix. Try the spacers first, please do not spend all those big bucks I have been reading...Thanks for your time....E...
#898 of 1068 2000 Grand Cherokee starting
Nov 17, 2011 (4:11 pm)
I have a 2000 GC Laredo 4.0....this past Monday night, my daughter was driving it and it cut off at a stop light. When she went to try to restart it, all the gauges went haywire, the gas gauge went from 1/8 to below empty, the volt meter went below 9 and it never re-fired. It was towed to a mechanic friend's business. At first I thought it was the fuel pump as I could not hear it running as I turned the key on, but the mechanics could not get any readings from a diagnostics computer, so we assumed it was the ECM/PCM. I have just changed the computer and it still will not start. I've cleaned battery terminals, checked fuses....no luck. The fuel gauge still indicates below empty, and I have put roughly 6 gallons in the tank, so it should be registering more the 1/4 of a tank. Battery volts still read 9v, and the key in the circle indicator on the dash is illuminated( there was not an owners manual in the vehicle when we purchased it). I have seen all the discussions on GC problems....any ideas????