Question about 1993 Jeep Grand Cherokee

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1993 Jeep Grand Cherokee Limited starts and dies

I have a 1993 V-8 with factory alarm removed, no alarms present in the vehicle, when I start it it fires up then dies. if I rev the motor from start it'll run, but as soon as I remove my foot from the gas it stalls out. I've replaced the battery and alternator. Before replacing the alternator the old one tested good under normal conditions but under load it failed. after replacing the alternator it does the start and die procedure. The old alternator read 14V on the dash and the new one reads about 10v. I had both tested at the local Kragen and both looked good. I'm at a loss. I'm about ready to pull all fuses to all accessories and go through them one at a time to see if there's a power draw somewhere. I've also heard that this almost sounds like a crank sensor issue but I'm not thinking so because it doesn't die randomly.

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  • TMchaney Sep 18, 2008

    That sounds like a good possibility,but does that explain the power drop? as I mentioned it's reading at 10v.

  • TMchaney Sep 18, 2008

    The Link is helpful, but unfortunately without a base start, I'm still just shooting in the dark. is my methodology of pulling all accessory fuses and adding them in one at a time a good place to start?

    I'm thinking that the possible power drain is in the stereo wiring. the original owner said he blew a fuse while wiring the original stereo up. Also the factory alarm has been removed but the wiring is still in place, could there be an issue there? thanks, all your help is greatly appreciated.

  • TMchaney Sep 20, 2008

    ok, doing more background research on the vehicle (as it's a friend's and not mine) I believe the problem is 2 fold. I found out that the car was sitting for 7 months, so my plan of attack now is for a major tuneup (oil change, spark plugs, fuel/air filter, cap, rotor, spark plug wires and running injector cleaners through it). But there is still a power draw I believe. I'm getting another alternator to see if the first was bad in case.

    Thanks for all the support, is there anything that I may want to check while doing the tuneup and hunting through the wiring system?

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If your idle is dropping low enough the alternator will not charge causing the drop

have you tried cleaning the iac valve?

Posted on Sep 18, 2008

  • TripleTauto
    TripleTauto Sep 18, 2008

    as far as pulling fuses there should not be one thing that is pulling that much current and will affect the running of vehiucle

  • TripleTauto
    TripleTauto Sep 22, 2008

    since it has been sitting that long look at wiring for rodents chewing on it. this is a common problem for cars that sit.I think the rats sell the copper to support all their dirty little rat habits :). You will see chew marks on the plastic

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  • Master
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Please use this link its the service manual for jeep:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a98a2


Good luck..

Posted on Sep 17, 2008

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  • Master
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Sounds like the idling solenoid. this solenoid when powered by 12 volts, would let a small amount of gas to the carburetor or intake line which ever you are using. if it is a fuel injection, then there could be a problem with the computer that monitors idling.

you don't have an idling.

tnx 4 using fixya,

drcool

Posted on Sep 17, 2008

  • 2 more comments 
  • francis rivero Sep 18, 2008

    that's an odd one too. but you said even when the voltage at the instrument panel read 14 volts, the problem still occurs?

    may i suggest that you put back the old alternator, see if the reading at the panel is 14 volts( that means the alternator is charging ) then the problem really is in your idling system. it doesn't have an idling.

    tnx again,

    drcool


  • francis rivero Sep 18, 2008

    if it dies again with 14 volts at the panel, then the problem is in the idling system.

    sorry for the slip,

    drcool


  • francis rivero Sep 20, 2008

    there is no issue even when original alarm wires are still in there.
    you can do that pulling of fuses and installing them one by one but you need to monitor the voltage in the battery to see when it would drop.

    tnx again,

    drcool


  • francis rivero Sep 20, 2008

    as long as you use the original numbers for the sparks plugs and the recommended oil viscosity, then there's no big issue in the maintenance of your friend's unit.

    tnx again,

    drcool


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