1999 Jeep Grand Cherokee Logo
Posted on Dec 29, 2008
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STARTS BUT WILL NOT STAY RUNNING

ON COLD MORNINGS-TURNS SLOWLY AND STARTS AND RUNS WHEN GAS IS APPLIED, BUT STOPS WHEN FOOT IS TAKEN OFF OF THE ACCELERATOR

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  • culp48 Dec 30, 2008

    LET UNIT SIT ALL DAY - OUTSIDE TEMP WENT TO MID-60'S, WHEN I TRIED TO START IT-IT WAS SLOW TO START, BUT DID START RUNNING. I REV'ED IT SEVERAL TIMES AND IT WENT TO IDLING OK. BATTERY IS OLDER THAN 2 YEARS OLD, SO I'M GUESSING THAT'S MY PROBLEM. I KNEW THERE WAS A "TPS" BUT DID NOT KNOW HOW TO CHECK IT. WHEN I REPLACE THE BATTERY, WILL IT GIVE ME THE SAME SYMPTOMS UNTIL IT RUNS 2 TO 3 MINUTES? YOU WERE A BIG HELP AND I APPRECIATE IT VERY MUCH. BEN

  • culp48 Dec 31, 2008

    GREAT! THANKS AGAIN.............. I HAVE ANOTHER PROBLEM WITH THE SAME VEHICLE, WHEN I GET TIME I WILL POST IT..............

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simidrm45844

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  • Posted on Dec 30, 2008
simidrm45844
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Joined: Dec 25, 2008
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Check the throttle position sensor"tps",or the idle air control "iac" by chance did the battery go dead or was unhooked?
if so the ecu was reset and needs to relearn idle settings by just keeping it running for a few minutes

  • simidrm45844 Dec 31, 2008

    Your welcome Ben

    If the battery is only unhooked for a few minutes it will be ok,but places like autozone have a small battery they can plug into the cig lighter to keep memory up when battery is unhooked.

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