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tune up question

Discussion in 'The Garage' started by big_truxx, May 5, 2005.

  1. big_truxx

    big_truxx 1/2 ton status

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    I need to tune my truck up. I doubt I will be able to get it into the garage that my buddy runs/owns due to my work schedule. So after work each night I will be puttering on my 82 to get the exhaust on and tuned up. It has a holley man choke (still need to get a cable for it...) think 600 cfm. It slightly backfires sometimes when ya get on it hard or let off too quick. It looked a little damp when I remopved my plugs, so I thought maybe too much fuel. I need to also take one of my timing lights to it to see where it stands on the timing aspect. I do not know how to tune the holley, and think maybe that needs to be done. Any tuneup advice very much welcomed! :D :waytogo:
     
  2. Fierospeeder

    Fierospeeder Banned

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    holley has a pdf on their site on adjusting their carbs. Or you can use a vacuum gauge to set the fuel mixture.
     
  3. PhoenixZorn

    PhoenixZorn 1/2 ton status

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    Big_Truxx, my 327 used to back fire with the Q-Jet, but the new 355 hasn't yet with the Holley or the Q-Jet... sounds like some issues with the carb if it was maybe rebuilt wrong or not properly jetted...
     
  4. pvfjr

    pvfjr 1/2 ton status

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    Yeah, might want to try jetting it down a bit, see what happens. It's a trial and error process.
     
  5. diesel4me

    diesel4me 1 ton status Premium Member

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    Holley huh??

    If thats an older style Holley carb,it might need a power valve--they get their diaphram ruptured when it backfires sometimes,and that will make it dump raw fuel in all the time,when it normally would stay shut until you floor it--that can cause it to run rich,load up,and foul the plugs eventually...might check into that... :crazy:
     
  6. big_truxx

    big_truxx 1/2 ton status

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    Well I put it in brand new out of the box about a year ago... and I really do not care to do trial and error on rejetting it because I do not know what I am doing there and also do not wish to keep throwing money at it in a blind attempt to fix it when I do not know all about it :haha:
     
  7. big_truxx

    big_truxx 1/2 ton status

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    I also just brought my spark plug gap back to 35 from about 45 i think. I will see when I get the exhaust all welded up and fire it up and put a timing light on it and see what all goes on
     

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