Think I got my ECU wet

Discussion in '911 Diesel Down! (Post only if your rig is broke)' started by clintusaf, Sep 20, 2017.

  1. clintusaf

    clintusaf Clint

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    Hey guys, today around 10 am i drive through about 36 inches of water while scoping out an area for a military exercise here in Italy. Later on went to run some errands, truck started and ran fine. Drove it about 5 miles, parked to run in some where and went to leave and all of a sudden I get some intermitent idleing and shutoffs. Tried cranking, it would crank back up, put it in drive and boom, it would die again. Did this about 4-5 times and now it wont start. Now the engine light stays on, tried to pull codes but it doesnt sense I have the key in the on position so guessing its not seeing the PCM. Disconnected batts, I pulled the PCM, removed my DP tuner chip to eliminate it as the culprite, and noticed the PCM pins had a small amount of moisture sitting inside the port. Dryed it the best I could, slapped it back in and no change. Pulled the PCM and have it taken apart to remove any other moisture overnight. Also pulled all the fuses under the steering wheel as well. Had to leave the truck at the place I was at inside thier locked compound.

    What do you guys think this could be? Open to all suggestions. Hoping its a simple fix since to avoid it being down for weeks waiting for parts over here.
     
  2. BIG JOE

    BIG JOE Full Access Member

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    'bout the only thing you can do is let everything Dry Out real good. Check the PDB fuses and relays.. under the hood for moisture too ? I've used a Heat Gun... all around under the hood and under the dash.. to dry things out... FWIW ?
     
  3. clintusaf

    clintusaf Clint

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    THanks BigJoe. Good to hear from you again. Been awhile. I will get my heat gun and go ham lol. Got the truck back to the house so I could work on her now
     
  4. clintusaf

    clintusaf Clint

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    What does PDB stand for again?
     
  5. BIG JOE

    BIG JOE Full Access Member

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    Power Distribution Box... located just in front of the Master Cylinder.. mounted on the inter fender. PIA to get the top off.. but once yer in there... ALL the PCM related relays and other 12v stuff (fuses) are there.
     
  6. clintusaf

    clintusaf Clint

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    Most of my fuses are under the dash and already checked all of those and some relays for the PCM. There are a few relays under the hood but havent checked them yet.
     

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