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motor deiseling

Discussion in 'The Garage' started by hi pinion, Oct 27, 2004.

  1. hi pinion

    hi pinion 3/4 ton status

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    DAMN!! its doing it again. IT wants to keep running when i shut it off.Anyone? /forums/images/graemlins/thumb.gif
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    I'm guessing you don't have a Q-jet with an idle kicker solenoid hooked up thats malfunctioning do you?

    That was one of the easiest "fixes" I've ever had on a vehicle. Unplug, dieseling stopped. /forums/images/graemlins/smile.gif
     
  3. big jimmy 91

    big jimmy 91 1/2 ton status

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    When this happened with my old carbed 1/2 ton I would fill a 2 litre pop bottle with water , warm up the motor and pour it down the carb slowly while reving it up
    Being careful not to let it stall out or pour it in too fast and hydro lock it
    This works great and is a cheap (free) fix to clean up the carbon that is causing the run on
    You may have to clean your spark plugs when you do it
    /forums/images/graemlins/thumb.gif
     
  4. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    That is a tricky deal with that CCC carb, I bet that your hi idle is sticking. It was last time I worked on the truck with you.

    I had the same problem when my K5 had the same fuel system as yours, I fixed it by pulling the complete system along with the motor and put something else in. /forums/images/graemlins/histerical.gif

    Just shut it off in gear and it won't do it.
     
  5. hi pinion

    hi pinion 3/4 ton status

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    But shutting it off in gear isnt the right way to fix the thing. /forums/images/graemlins/thumb.gif
     
  6. four_by_ken

    four_by_ken 1/2 ton status

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    Have you adjusted your timing lately. Sounds like it needs to be timed.

    Or are you running a low octane fuel in a motor that needs higher octane?
     
  7. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    I second the timing. Mine used to diesel at 8* BTDC, I put it at 12* and haven't had a problem since. Before you get too far into it, try messing with the timing.
     
  8. 84_Chevy_K10

    84_Chevy_K10 Banned

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    More timing is what makes it diesel acutally.

    Set your timing at 4* or where it belongs and set your idle correctly and it will stop dieseling.
     
  9. hi pinion

    hi pinion 3/4 ton status

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    [ QUOTE ]
    Have you adjusted your timing lately. Sounds like it needs to be timed.

    Or are you running a low octane fuel in a motor that needs higher octane?

    [/ QUOTE ] Its brand new crate motor. Shoudnt i be ok with just regular 87 though??? What about a vacum leak?? Nobody said anything about that. /forums/images/graemlins/thumb.gif
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    9:1 or less *typically* is ok with 87 octane on motors even with junk heads, as long as the timing isn't too advanced.

    Backing off timing is easy enough to do, worth a shot.
     
  11. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    [ QUOTE ]
    More timing is what makes it diesel acutally.

    Set your timing at 4* or where it belongs and set your idle correctly and it will stop dieseling.

    [/ QUOTE ]

    Derrrrr.... /forums/images/graemlins/doah.gif I mean I started at 12* and went ti 8*--sorry for the misinformation. /forums/images/graemlins/screwy.gif
     
  12. Corey 78K5

    Corey 78K5 1 ton status

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    First thing I would check is timing (make sure to plug of the vacuum advance). check for vacuum leaks. Then check make sure the carb is adjusted right. Oh and quit buying the cheap gas from Arco You cheap basterd /forums/images/graemlins/wink.gif /forums/images/graemlins/tongue.gif /forums/images/graemlins/rotfl.gif
     
  13. hi pinion

    hi pinion 3/4 ton status

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    [ QUOTE ]
    First thing I would check is timing (make sure to plug of the vacuum advance). check for vacuum leaks. Then check make sure the carb is adjusted right. Oh and quit buying the cheap gas from Arco You cheap basterd /forums/images/graemlins/wink.gif /forums/images/graemlins/tongue.gif /forums/images/graemlins/rotfl.gif

    [/ QUOTE ] /forums/images/graemlins/rotfl.gif Go tell it on the mountain Brother. /forums/images/graemlins/rotfl.gif
     
  14. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Timing and check the choke.
     

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