Need a 7.3 Powerstroke Guru...

Discussion in 'Tow Rigs and Trailers' started by Paul, Aug 7, 2017.

  1. Paul

    Paul Dr 'Dre Moderator

    Joined:
    Feb 10, 2008
    Location:
    Kings Mountain
    My sil fired up his tow pig the other day and it runs like crap. Sounds like a fuel knock to me and smokes like hell. Scanned it today and got a po236 code. MAP sensor bad?
    Truck is a 1997 F250, 5 speed with 180000 miles on it.
    TIA!
    'Dre...
     
  2. AV8

    AV8 Well-Known Member

    Joined:
    Oct 8, 2005
    Location:
    Oxford
    Any other codes? Easy thing to check is to unplug the ICP sensor. If it starts running smoother then it'll need replaced. Do you have a way to watch live readings on the truck?


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  3. Paul

    Paul Dr 'Dre Moderator

    Joined:
    Feb 10, 2008
    Location:
    Kings Mountain
    Where is the ICP sensor located? And no on the live readings.
     
  4. AV8

    AV8 Well-Known Member

    Joined:
    Oct 8, 2005
    Location:
    Oxford
    [​IMG]


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  5. Paul

    Paul Dr 'Dre Moderator

    Joined:
    Feb 10, 2008
    Location:
    Kings Mountain
    Thanks! Cody should be chiming in shortly.
    @sleepinc
     
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  6. powerstrokin04

    powerstrokin04 Well-Known Member

    Joined:
    Oct 2, 2008
    Location:
    Lake Wylie SC/ Ellenboro NC
    If there is oil inside the icp sensor plug it should be replaced. I would check the map sensor vac hose for leaks or blockage. Also when was the last time the oil was changed? Powerstrokes and their oil fired injectors act funny with dirty oil.

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    Last edited: Aug 7, 2017
  7. sleepinc

    sleepinc Well-Known Member

    Joined:
    Mar 17, 2008
    Location:
    Iron station,nc
    Thanks for the help first off.
    Checked the icp plug no oil inside of it but nothing changed by unplugging it still running ruff and smoking.
    The oil still has 1500 miles to oil change and oil level is good.
     
  8. sleepinc

    sleepinc Well-Known Member

    Joined:
    Mar 17, 2008
    Location:
    Iron station,nc
    Ok I forgot the vacuum line is clear not stopped up
    I also unplugged the map sensor no change there either
     
  9. sleepinc

    sleepinc Well-Known Member

    Joined:
    Mar 17, 2008
    Location:
    Iron station,nc
    After all this a cranked the truck one more time after checking back over everything and smoking has stopped but still running very ruff and engine light still on


    Just to add I did do a live test the boost pressure read 19psi not running and it read 19psi running but never changed

    And barometer pressure was like 28. something not running and the same running no change
     
    Last edited: Aug 8, 2017
  10. AV8

    AV8 Well-Known Member

    Joined:
    Oct 8, 2005
    Location:
    Oxford
    Maybe a bad IPR, check and make sure the tin nut hasn't fallen off. I recommend buying a wireless OBD2 reader on Amazon, they are less than $20. Then you can download a free app and watch live readings. It'll be much easier to diagnose the problem and keep you from wasting $ buying parts you don't need. Some apps even let you do a buzz test which will help you determine if you've got injector issues.


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  11. sleepinc

    sleepinc Well-Known Member

    Joined:
    Mar 17, 2008
    Location:
    Iron station,nc
    Just checked the ipr the nut is still on it.

    Yea the scanner i used, i borrowed from the garage at work it will do way more stuff than I know what to do with
     
  12. powerstrokin04

    powerstrokin04 Well-Known Member

    Joined:
    Oct 2, 2008
    Location:
    Lake Wylie SC/ Ellenboro NC
    A unplugged map usually causes heavy smoke and poor running conditions. If you unpluged it and there is no change, I would suspect it being bad. There is a test where you can check voltage at different pressures using a hand vacuum pump and volt meter. Maybe tap on the map a little. I've made faulty electrical components work by this method. Other areas to check is battery voltage, Exhaust back pressure sensor, boost leaks, etc can all cause those conditions.

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  13. sleepinc

    sleepinc Well-Known Member

    Joined:
    Mar 17, 2008
    Location:
    Iron station,nc



    Might be onto something tapped on the map sensor while running started doing all kinds of stuff smoking came back started running worse
    So might need to order one
    Thanks to all that helped
     
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