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Starts, runs briefly, and then shuts down

Discussion in 'General Jeep Discussion' started by TexD, Jan 15, 2017.

  1. Jan 15, 2017 at 11:38 PM
    #1
    TexD

    TexD [OP] New Member

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    Tex
    Vehicle:
    1993 Red Grand Cherokee
    3 inch lift and 33's
    I've been doing a lot of research on this problem and have replaced the coolant temp sensor, crankshaft position sensor, o2 sensor, cleaned the idle air control, I have used the default setting for the map sensor, split the cat to have free flow , new cap and rotor, and a new alternator.
    I'm getting spark, fuel, and I have good compression. The only think I can think at this point is an ECM. Sometimes it'll run long enough to drive around and just recently it started getting worse.
    Is there anything I haven't thought of or haven't covered? I've ran through wires and everything looks solid. Coil maybe? That's the only thing I haven't replaced besides the ECM.
    Thank you for your time.
     
  2. Jan 16, 2017 at 5:27 AM
    #2
    JeepMafiaMama

    JeepMafiaMama Well-Known Member

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    Central ny
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    Check battery terminals....my 98 use to do that. The terminals were wore out n needed replacement n tightening!! Just a thought. It be nice if it were that quick,easy and inexpensive... Good luck to ya.
     
  3. Jan 16, 2017 at 1:50 PM
    #3
    C2T

    C2T Well-Known Member

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    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Does it start right back up after dying or does it need to sit for a while (cool?) first?
     
  4. Jan 16, 2017 at 1:54 PM
    #4
    C2T

    C2T Well-Known Member

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    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I had a friend with a similar issue. It turned out to be a clogged fuel filter. As well, coils are heat sensitive. Have you tested that?

    Oh...and my favorite recently (it has worked a few times too) is the Throttle position Sensor (TPS).
     
  5. Jan 16, 2017 at 3:04 PM
    #5
    TexD

    TexD [OP] New Member

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    1993 Red Grand Cherokee
    3 inch lift and 33's
    It's not temp related cause it's not picky when it dies and will start right back up.
     
  6. Jan 16, 2017 at 3:04 PM
    #6
    TexD

    TexD [OP] New Member

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    1993 Red Grand Cherokee
    3 inch lift and 33's
    It's very random
     
  7. Jan 17, 2017 at 10:24 PM
    #7
    bob.net

    bob.net Member

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    1999 tj sahra
    body lifr
    The P C M is not reading the ignition key fob or the key.
     
    JEEP # 5 likes this.
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