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Jeep Grand Cherokee Start Stall Idle Problems

578 messages,  Last post on Nov 09, 2009 at 9:07 PM

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#516 of 578 Re: HELP!!! 96 Country won't start [timmboj] by cozaluk Apr 28, 2009 (9:59 am)
Replying to: timmboj (Sep 12, 2007 4:18 am) i have a 94 gc.. and have replaced everything. coil, ecm, fuel filters, plugs, ignition switch, distributor cap and rotor.. and now it shuts off while driving, sometimes restarts , sometimes doesnt, yesterday and today drove fine to sons school went to restart to leave NOTHING. cranks over. but no start.. dont know what else to do. someone told me crank shaft sensor. or ignition module. after about 30 minutes in will restart.. HELP
#517 of 578 Re: 2004 Jeep Grand Cherokee Starting Problem [osornio] by tuggajb Apr 28, 2009 (12:24 pm)
Replying to: osornio (Apr 28, 2009 8:02 am) i would change the ignition switch could have bad contact inside
#518 of 578 Help! I think my 99 JGC might have swine flu. by sufe70 May 03, 2009 (6:17 pm)
I have a 99 JGC 4.0 with 118k. In Dec. she began giving me a no start issue.Very random. She would crank just not fire.Once I cranked it and stepped on the gas she would fire right up but would not hold idle. I could double peddle and get her going and once moving she was fine at stops she would idle.It did this 3 more times over a month period. I then parked it for the winter. Recently I began looking into it again.I replaced the battery because it died over the winter and was 6 years old. It cranked but again would not start unless givin gas.And would not idle until I held it at a steady RPM for a minute or so then slowly released my foot. I also noticed that if I stomp on the gas, when she decelerates she stalls out or bogs down to about 300 RPM and climbs back to about 750 RPM. I'm thinking TP sensor. I am not getting a engine light or any codes.I would think if I have a sensor problem I would be getting a code. This is really troubling. I also have now been hearing chirping from the cargo area leading me to question the fuel pump.Could the pump be making noise because it sat for a few months? Or is it most likely a sign it needs to be replaced? Replies to this message: finisher (May 04, 2009 6:14 am)
#519 of 578 Re: Help! I think my 99 JGC might have swine flu. [sufe70] by finisher May 04, 2009 (6:14 am)
Replying to: sufe70 (May 03, 2009 6:17 pm) Thank you for the reply. Last week I changed the crankshaft position sensor and the problem has not come back. It is fairly easy to change. I had to get under the vehicle and remove the old one which is located on the driver side on top of the bell housing. Mine (1996) was held on with one 11 mm bolt and had a electrical connection located behind the distributor. Good luck.
#520 of 578 Interesting discussion with dealer service dept. by sufe70 May 06, 2009 (7:35 pm)
Just found out today by dealer that My 99 JGC is on a recall for OBD issues. Said most likely that is why I am not getting any codes for my Jeeps problems. He said the PCM gets bad data at some point and goes into sort of a state of limbo.It may still communicate with the engine and sensors but stops giving out diagnostic codes to the driver.Or it will give you a code but you'll never be able to clear it even after making the required repairs. I have heard many on here who were sold new PCM's and I am begining to wonder if all they had to do was contact a Jeep dealer? You see a small time mechanic who may be a very skilled mechanic but not a dedicated Mopar/Jeep mechanic is going to hook up diagnostics.If the PCM does not send data it's going to be condemned 10 out of 10 times.And almost all times a new one will either fix the jeeps problems or atleast now give out codes.But maybe the PCM was still good and only needed to be flashed by Jeep? Just a thought. Mines going in as soon as the mechanic down the road is done looking it over. So if your beating your head against the wall on a mysterious issue and not getting engine light or any codes. Check to see if your on a recall list for the OBD? If it is? they can flash it for free.As long as the PCM is good either it will cure the issues or atleast now give out data telling where to begin.
#521 of 578 OBD recalls for 99-00 by sufe70 May 06, 2009 (7:46 pm)
Here is the OBD/PCM recalls for 99/00 There are also many other years that have various OBD or PCM recalls. So if your OBD is not giving you any codes for a ailing issue?Check your VIN with a dealer and if needed get the flashes done.Because without it your PCM cannot communicate with you acuratly.   Emissions Recall No. 882 - REPROGRAM PCM: OBD READINESS CODES Recall Date: December 2000 Emissions Recall No. 8591/8592 - REPROGRAM PCM: CATALYST MONITOR Recall Date: March 2000
#522 of 578 Skim / gauges dead problem by ajcarey May 06, 2009 (9:41 pm)
Iv got a 2001 JGC 4.7l and im having this problem where im getting a error p1686 (skim) but the dealer cant access the computer to reset the system??? Im not sure if i should replace the PCM or skim moduel or if it is the battery???
#523 of 578 94 JGC Starting, Idle and running problems by lewisj Jun 02, 2009 (6:36 pm)
I have had nearly all of the same problems that most of you have had. Starting, low idle, running rough, and burning rich not passing emissions etc.. I have replaced the idle motor, o2 sensor, map sensor, chased wires, ground wires. up until recently the only code that would show was 52 (extremely rich). After 3 years and at my wits end, I finally decided to replace the PCM. I found one at a junk yard off of a 95. It has been about a week and it seems to have solved the problems (knock on wood). It idles at the proper RPM, better fuel economy, and thus far I haven't had any problems or codes. I hope that this might help others that are having similar problems. Good luck. Replies to this message: eric784254 (Jun 22, 2009 1:02 pm)
#525 of 578 01 Grand Cherokee ignition issues by ihornsby Jun 03, 2009 (3:39 am)
I have a 2001 Grand Cherokee that im having starting issues. This has been a intermittent issue. When I turn the key to start it, the dash lights come on but the engine does not turn over or anything. After several attempts to start by turning the ignition it finally will start. No starter drag or anything, a clean sounding start. it does this cold or hot. I checked the Battery and battery cables, they appear to be fine. sometimes it will start the first time, other times it takes 5-10 attempts. Thx for any help. Replies to this message: ihornsby (Jun 04, 2009 4:43 am) ihornsby (Jun 08, 2009 4:05 am)

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