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SUVs Jeep Cherokee and Jeep Grand Cherokee Jeep Grand Cherokee Start Stall Idle Problems
586 messages, Last post on Nov 20, 2009 at 2:14 PM
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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. |
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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 |
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| 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??? | |
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.
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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.
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Replying to: osornio (Apr 28, 2009 8:02 am) Thx |
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Ok here is the deal.. I was driving my 2002 JGC to Fl which is about a 5 hr drive from where I live. It is a lot of stopping and going. But after about 4 hours when we would get to a red light it was shaking bad when we were stopped. Now 2 weeks later it is still doing it. We thought maybe we had gotten bad gas. that wasnt the case. If you put it in N while stopped at a red light it is fine it doesnt shake. Also when you start to pull off from the light it hesitates. Please help me!! I just spent 536.00 on a thermometer and a radiator fan.. I would like to come out as cheap as possible.
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Replying to: lndancy84 (Jun 03, 2009 10:45 am) |
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Replying to: ihornsby (Jun 03, 2009 3:39 am) |
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