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Puddle and CEL

Thread in 'Help Forum' started by TERRANCE R DEBORD, May 29, 2019.

  1. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    I've got a strange situation - 2007 ST 4X4 V6 XLT 132,000 miles. I've had twice now that when going through a puddle - not a big one either - the engine shortly after will go into limp along mode and eventually die. Wrench flashes, CEL comes on and my cheap scan tool gives me all kinds of TPS type codes. I wasn't thinking this last time and cleared them before I saved them off. I'll pull off the road, sit 5 minutes and then it starts up fine, Wrench is gone but CEL on till I cleared it. During the 5 minutes, tried to restart and it would but the rough idle, no power and I don't think I could get RPMs over like 2000. After that it shows no sign of any issues and runs great as normal so I'm thinking it's just a matter of something that gets wet and then drys off and is fine.
     
  2. EddieS'04

    EddieS'04 Well-Known Member 1st Gen Owner 2 Wheel Drive V6 Engine

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    The sensors that I can think of, that might cause this. The crank sensor on the the block that reads crank shaft position. Or the main cat O2 sensor. Or the vapor purge tank wireing.
    Might thoughts on these are 'cause they are down on the lower part of the Trac. Might have some frayed wires or bad connectors. If it was plug wires, you would have to go thru some higer water. Just making some guess work..
    I had a '78 dodge van that would do the same. If I splashed thru high enough water. That was before modern electronics. I never did find the problem.
     
  3. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    I have yet to get under and do some detailed inspection. What I might do is run till engine warm and then do some very specific hose squirting and see what results I get.
     
  4. EddieS'04

    EddieS'04 Well-Known Member 1st Gen Owner 2 Wheel Drive V6 Engine

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    Have you found it. I would also check all under side wireing and connectors.
     
  5. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    No - so far eluding me - my wetting of components yielded no good results - have to re-inspect/rethink this
     
  6. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Check the Fuel pump driver module ( Corrosion and water eats it), The wires at the TB, MAF, TPS are all known for the insulation crumbling, so check those too. also check all the 02 sensor wires.
     
  7. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    Great suggestions, get under there again and check that out - the goofy thing is the code it throws in relationship to where the water is.
     
  8. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    Breakthrough!!!! I think I figured it out or very close. I have to admit though my own stupidity in a way. I work for a command center for a very large IT organization and my job is all about data - millions of bits of data every 5 minutes...I didn't trust the data my truck was telling me. I thought my own observations were more true than the truck data. Yeah, not so much. Yesterday was a good raining day and as luck would have it my truck started the bad stuff on the freeway - luckily I was able to limp off the freeway and get to city streets. Over the next half hour I did about 6 or more cycles, half a block at a time, truck acts up - I read codes - I save off the codes, I clear the codes and on I go for another half block. I finally sat for a few minutes and looked at the freeze frame data and the codes - The first code every time was a P0122 = Throttle Position sensor based code. Why would that be, ran through a puddle or in this case good and raining and that is on the top of the engine? So I flipped up the hood, felt around by the TPS, not wet, fingered the wires a bit - push in the plug and got back in. Started the truck and proceeded to drive home (another 8 miles) like nothing ever happened. Drove to work today since I didn't have time last night in the pouring rain to look at it but today is sunny. tonight or this weekend I'll have to look closely at the wiring. My only theory is that the water up on the passengerside exhaust manifold caused steam to rise up and then create the condition for a short of some sort. It has never acted up when dry out. upload_2019-6-13_6-35-13.png
     
  9. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Some one could have hit the lock and it popped loose. Check the wires to make sure they are not frayed. Check the tabs to make sure the clip locks on. Hopefully it’s all good and your done with this.
     
  10. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    Good advice - thanks
     
  11. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    Well now...I think I see the problem...ha. upload_2019-6-17_6-47-43.png
     
  12. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Yup. Common. Can tape or buy pigtail and replace. I hate fords quality on wiring.
     
  13. EddieS'04

    EddieS'04 Well-Known Member 1st Gen Owner 2 Wheel Drive V6 Engine

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    If the wires inside the conector are good. I would cut the middle of those place shrink tube on them with the internal wax seal. Then solder and seal the wires.
    Our as Todd says, buy a pig tail connector and do the same thing with shink tube and solder.
    I have never ben a fan of tape under the hood, Unless it is Scotch 130C linerless rubber splicing tape. It makes a good seal that heat cant unravel it.
     
    Last edited: Jun 17, 2019
  14. TERRANCE R DEBORD

    TERRANCE R DEBORD Member 4 Wheel Drive V6 Engine

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    In the coming weeks I'll focus on a more permanent fix - it did go on a 8 day 3100 mile trip without issue and tape still all in tact and looks good
     

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