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urgent Question Need Help! - SOLVED!

Discussion in 'The Garage' started by Chevy305, Nov 24, 2006.

  1. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Ok so I rebuilt my carb today because the of me sucking in a bunch of muddy water. But, now I can't seem to get my truck to run right, it keeps detonating like crazy, and there is nothing I can do to stop it. It won't stay running unless I am on the gas. Also I retarded my timing because I thought that might be the issue but it did nothing to help. I also played with the float level and the idle screws but the only a slight difference when I raised the floats.

    I'm a little lost, why is it detonating like this?

    BTW: The carb is a Holley 4160 600cfm that can have my engine run as smooth as glass. But i guess not anymore.
     
    Last edited: Nov 25, 2006
  2. readymix

    readymix 3/4 ton status

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    Sounds like a timing issue to me
     
  3. 1977k5

    1977k5 3/4 ton status Vendor

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    Detonating or backfiring? If you sucked mud through the motor you could have some valves hanging open.
     
  4. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Definately detonating.

    Also the truck did run after it sucked in some mud. Just the idle was a little rough and there was still a little mud on the secondary throttle plates so I decided a rebuild was in order even though above idle it was smooth.


    Maybe my distributor isn't advanced enough? I will have to try again in the morning.

    If anyone has any possible suggestions please post up!
     
  5. beater_k20

    beater_k20 Banned

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    so how exactly did you get mud into the carb... :thinking:
     
  6. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    http://youtube.com/watch?v=hthz1q7cdKA

    That is how :D

    Anyway, I advanced the timing a little more today and it helped slightly, but still sucking.

    So I guess I will take the carb off and take it apart to make sure I didn't screw something up inside it.

    Also seriously, any suggestions to what the problem might be, no matter how stupid they may be.
     
  7. K5-newf

    K5-newf 1/2 ton status

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    check to see if theres any mud your distributor might be water in the gas i dunno realy sounds liek timing did u try retard the timing


    see i only look stupid

    nice stepside by the way
     
  8. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    Retarding timing cures spark knock, not advancing it...

    Are your advance weights working correctly?
     
  9. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Ya it was all working correctly until I pulled the carb to clean it up because I had a pool in my secondaries of muddy water. But I competely cleaned everything up and all teh dirt out of the carb, so I don't get it.

    Also since off roading I never touched the ingnition or timing. That is why I am confused about the whole situation.

    I will go set the timing back to where is was originally and then pull the carb and redo the rebuild.
     
  10. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    Just figured they might have gotten crudded and where hanging up...

    Sounds like it may be leaning out on you...

    Hope you didn't hurt the cylinders from that mud... Have you taken a peek at your oil?
     
  11. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Ya I already changed the oil.

    I could be just extremely lean, that might be the problem :thinking:

    I'll go out now and report back in a little while.
     
  12. JEBSR

    JEBSR 1/2 ton status

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    Are you sure you put the metering plates and jets on the correct side?
     
  13. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Ok so I figured it out!! :D

    It turns out the accelerator pump wasn't pumping gas out of the main jets. So it was running extremely lean. So, after a bunch of tuning i got it running better than it did before I went offroading. :D :D
     
  14. JEBSR

    JEBSR 1/2 ton status

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    :waytogo: Good deal. Glad to here it
     

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