Question about Dodge Intrepid

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Engine Cutoff HERES A QUESTION THAT STUMPS THE PRO'S. CAN THE ALTERNATOR ON A 1999 DODGE 2.7 PROPERLY CHARGE THE BATTERY AND NOT SEND POWER TO THE PCM WHICH THERE IS A SEPERATE FIELD CIRCUIT JUST FOR IT? I HAVE CHECKED OR REPLACED VIRTUALLY EVERY SENSOR, CIRCUIT OR COMPONENT , WITH THE EXCEPTION OF THE ALT. THE CAR WILL BE RUNNING FINE THEN ALL OF A SUDDEN START MISFIRING, BACKFIRING, AND EVENTUALLY QUIT. RUNS GREAT WHEN IT RUNS. ENGINE WILL START AND RUN UNTIL THE KEY IS RELEASED INTO THE RUN POSTION FROM THE START POSITION. THANKS TB

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  • trybker May 08, 2009

    Thanks for the info. Have replaced cam/crank sensors. I'm a Nissan Diesel tech and have a slight background od experience in gas engines.Still looking for the answer of the alternator capabilities.Sometimes when this problem occurs the battery light will come on before the stallout.



    Thanks

    TB

  • trybker May 10, 2009

    The voltage regulator is in the PCM, and there is a seperate circuit to the alt (gen, field circuit) that goes to the generator field driver in the PCM. Can the alt. properly charge the battery and not signal

    on this circuit?

    Thanks TB

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  • Master
  • 2,559 Answers

Short answer is no,The alternator has a built in regulator that if it does not function correctly can allow for power surges and set off many codes and cause shut down issues as well a many other problems.However It does not send power to different items,It sends it to one location and from there it is distributed to the many different circuits.

But as far as the car dieing as soon as the key is released to the run position, would indicate the ignition switch is bad.

Posted on May 10, 2009

  • Randy Hough
    Randy Hough May 10, 2009

    Sounds like the PCM is the problem,The alternator doesn't send power to the PCM,The PCM read the power being produced by the alternator,Power to the PCM is supplied through one of the Power distribution boxes(Fuse boxes)Just like everything else in the vehicle.

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  • Dodge Master
  • 6,674 Answers

You checked crank sensor & cam sensor right? If all that checks out good, I'd be tempted to remove battery cables, then remove connector on PCM, and clean all contact good with electrical cleaner & retry. So many of the items in that area are controlled by the PCM, it's worth a shot. If you go to (autozone.com) sign up for free then go to repair manuals for your vehicle, and read what the PCM controls, etc, you may stumble upon something you haven't checked already.

Posted on May 08, 2009

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    --------------------------------------------------
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