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Jeep Grand Cherokee Start Stall Idle Problems

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  • Thanks for the info. I'm a bit worried about the wiring in this vehicle. I have other electrical issues. The driver side door lock button locks the door, but wont unlock it. This car has the keyless entry sensor above the rear view mirror, but I don't have the key fob. I hope I don't have any issues with the anti-theft system that is causing the ASD relay to shut off. May have to dig into it. I will mess around with the harnesses as you suggested.
  • My problem was similar and I replaced the cam and crank shaft sensors and have not experienced a problem so far. The parts are fairly inexpensive.
  • tuggajbtuggajb Posts: 646
    that what tells the trans to shift should just be able to change tps should fix probb
  • i am a recent jeep newbie, just bought a 1994 jeep grand cheroke laredo 4x4 with the 4.0 liter straight 6. supposidly it had a bad fuel pump, and it did. i replaced the fuel pump, along with the fuel filter, and a fuel pump relay. now i have read on other forums that these vehicles do not have an inertia switch, and with a vast automotive knowledge know that it is not acting like an inertia switch is tripped(the fuel pump runs) but are there any other safteys on this vehicle? also i know it needs plugs, a cap and rotor, but what gets me is that it will run on ether(starting fluid) and not on pump gas,i noticed that the plugs, wires cap and rotor were bad by chance, i'm a second shift heavy duty mechanic and only get time to work on it after dark, and noticed the plugs and wires arcing in the plug housing on the head, track marks and corrosion in the cap and on the rotor, and soot on the plugs at the base of the boot, along with the electrodes on all the plugs worn down to the base, but why would it run on ether and not pump gas? im out of ideas if the plugs cap and rotor dont do the trick pleas help...... i need all the help i can get, i dont know [non-permissible content removed] about mopar, i'm a chevy boy and have never ran into this before. :mad:
  • i also thought i should mention that this vehicle hit a deer. could there be something im overlooking, i also wanted to mention that the fuel rail only has decent pressure on the initial key turn, after that first time after sitting overnight, it seems to deminish, but again i am wondering why ether and not pump gas
  • papenpapen Posts: 11
    All repairs done on my 1996 Jeep. Then I got smart. The wallet handing out to much cash. Had the computer rebuilt (sent out) they found loads of errors cost me 395.00 haven't had a problem since. Now remember taking it to Jeep they found "NO" errors on computer. If you are tired of sitting on the side of the road consider getting computer rebuilt. The location of the computer was to close to wet items which over a period of time could ruin.
  • I have a 2002 Lerado, 3.0 w/104k miles on it.

    A month or so ago as I was driving the dash lighta flickered and then stayed on but the car was still running fine. When I stopped, I turned off the car and when I tried to start it, nothing happen, no clicking, no nothing. After trying a few more times it started and off I went. All was fine after that untill the other day I backed my car up to my trailer, turn it off, got out and hocked everything up. Then got back in and turned the key, it started for a spilt second and died, now it simple turns over and doesn't start.

    I removed the battery cables, cleaned them both and put back on (even though it turned over strong, thought I'd give a reset to the PCM modules). Turned the key and it still turns over but doesn't start, not even attemps to start. I checked the EFI pressure and it was fine, each time I releave the pressure it build back up when trying to start it again.

    Anyone have any ideas?

    Dennis
  • I've got a 2000 JGC that wants to stall out while drive down the road. It usually when I am coming out of a stop light or stop sign. It just sort of sputters when I hit the gas and acts like it's going to quit. It even begins to make a knocking sound. Sometimes it will suddenly just take off and things will be fine, other times I have to shut it off.

    What's really odd is that if I shut it off and turn it right back on, I can drive off with no problems. Seems to happen mostly first thing in the morning or after sitting for a couple of hours.

    Thoughts?
  • Hi all,

    I was hoping someone might help-- My Cherokee (101k miles) has recently started bucking/hesitating at 2000 RPMs, usually on up hill climbs. OBD2 says multiple misfire....I replaced the plugs, same problem.

    It tends to last a bit, than stop, usually accompanied by a blinking check engine light, which I assume is the misfire, then it runs fine. It rarely happens when I start it cold and drive to work (1+ hour)

    It seems to do it more after short stops/restarts (like gas station, quick store stop), but it's getting worse.

    Any thoughts? I'm thinking TPS?
  • tuggajbtuggajb Posts: 646
    that is the first thin to try also crank pos senser (rear of ingine driver side PIA to get to
  • I have a 2001 Jeep Grand Cherokee Limited Edition (4.7L Power Tech V8). About 2 months ago I started having a problem.

    I went to start my vehicle and nothing happened. It was like there was no power. No lights on the dash, no lights on the cd player, and I could hear a clicking noise. However I know the vehicle did have some power going through because I could hear the CD changer resetting.

    After taking the key out and trying again it started. However immediatley after starting the vehicle died out. It did this another 10 or so times. I then started it and gave it some gas to keep it going, this worked and I was able to put it into drive.

    Once it was in drive everytime I took my foot off the gas and attempted to stop/slowdown the RPM would drop to almost zero, then it would stall out.

    Once I start it back up again, the RPM goes up and down a lot, and then it will eventually stall out again.

    I took it to the garage and they replaced something to do with the throttle (I don't know the exact part) and they have replaced the MAP sensor.

    Everything was working good until today, when I went to start it. First it did the same thing. At first no power, and a clicking noise. Then everything kicked on and it started.

    Of course as soon as it started it immediately stalled out. Again it did this for another 5-6 times until I kept my foot on the gas and put it in drive. Again still when ever I take my foot off the gas or apply the breaks, the RPM drops to about 100-200, and then after a few moments it will die out.

    After it runs for a few minutes in drive, if I shut it off and start it again, it will stay started, but the RPM will flucuate between 100-400, and then eventually stall out.

    My garage doesn't seem to have any idea what could be causing this. And I don't want to keep dropping money into new parts that may or may not fix the issue. Any ideas what this could be?
  • tuggajbtuggajb Posts: 646
    how are the battery conections also how old is the battery if more than year or two old change that first cheap to replace and will take care of prob 75 per cent of time
  • When I start the engine it starts at high rpm's then settles down. When I am driving and come to a stop, it tries to lurch and goes into high rpm's. At times it seems that the gas pedal is stuck. I press it to kick the rpm's down. Sometimes that works, sometimes it doesn't.

    Cruise control - while engaged, the rpm's go up and down continuously.

    Any suggestions? :sick:
  • tuggajbtuggajb Posts: 646
    how many miles
    sounds as is your tps (throttle posising sencer) is dirty or bad
  • I have been having problems with my 2003 jeep cherokee, when I start i the engine idles to approx 2000rmps and stays there for 10 seconds. When i am driving the rpms are jumping up and the vehicle :confuse: jerks . I need to pull over and shut it off, then it works fine. also when I am coming to stop the rpms stay high and the front end vibrates. some days it runs fine but most days it does not. the check engine light has turned on ,but turns off once I turn the vehicle off and on. I took it to mechanic , he tuned it and adjusted some valve. it worked fine for couple of hrs. when they check the computer for the messages, it showed two oxygen sensors defective , they were replaced , it worked fine for one day. I am still having the same problem. any help for feedback would be appreciated. I have already spent to much money on these repairs. thanks .
  • This wasn't my post. I have the 2004 4.7L H.O. with the idle problem. See my post.
    Thanks. What do you think?
    goldenbetty
  • tuggajbtuggajb Posts: 646
    still think you have bad tps

    the tps tells the computer where the throttle plate is if it says that it is not all the way closed at idel the computer thinks that you are pushing on the gas tells injectors to inject more gas air mixture gets high with unbernt gas senced by oxy sencer tell computer to not inject as much gas tps sends reading that plates are open when they are if fact closed cycle starts all over
  • When it stalls I can tap on the left most connector on the computer module (facing fire wall) and it will start and run fine. The computer module is less than a year old. Is there something I can do short of replacing the module?
  • tuggajbtuggajb Posts: 646
    deconect the battery
    unplug the wires that plug in to computer and plug in unplug couple times see if that dont fix prob

    could be dirty contacts unplugin and plugin in scrapes the contacts clean
  • 1997 Grand Cherokee. 4.0L Runs great but when it is cold it takes 5 to 7 sec to turn over. Any subsequence starts are normal.
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