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What causes an EFI motor to stall?

Discussion in 'The Garage' started by 84k5, Apr 2, 2002.

  1. 84k5

    84k5 1/2 ton status

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    I was under the impression that a fuel injected motor could run upside down if it wasn't for the oil running past the rings. I saw two TJs stall more than once goin up a steep hill though. What gives? Was funny to watch a CJ go up the same hill. It stalled several times and actually crawled part way up under the power of the starter motor. I took the go around.
     
  2. TopOff

    TopOff 1/2 ton status

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    Many things... actually.

    If they have the oil-pressure switch in, the loss of oil pressure will kill the fuel-injetion pump.
     
  3. BurbinOR

    BurbinOR 3/4 ton status

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    Also could have uncovered the fuel pickup in the tank, starving the motor.
     
  4. pcorssmit

    pcorssmit 1/2 ton status

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    With a stick, its not that hard. Especailly with stock gears, if you put enough of a load on it, it will stall. The computer can only compensate so much.

    Pete
     
  5. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    The oil pressure switch you are speaking of does not kill the fuel pump, it actually allows the fuel pump to continue pumping as long as there is oil pressure if the fuel pump relay were to go bad
     

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