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gas in the Vacum advance ....... edelbrock 1405 ???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by twenty_below0, Mar 18, 2003.

  1. twenty_below0

    twenty_below0 1/2 ton status

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    Just built this carb about a month ago with bigger needles, spring loaded etc. alot of time went into smoothing the venturies etc. and it runs really good but the vacum advance had gas in it today . I did have it load up on me about 3 days after I got it on from a small piece of trash under a float seat , that stopped almost as immediately as it started and I got a filter on it , after that it's been flawless , with exception of tuning the rods etc. So is there some particules causing this ? Should I pull it apart or was it from that one time and I hadn't noticed it until now . All suggestions please /forums/images/graemlins/grin.gif
     
  2. TopOff

    TopOff 1/2 ton status

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    Where (which port) is your vacuum advance plugged into?
     
  3. twenty_below0

    twenty_below0 1/2 ton status

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    it was on the timed port , as I assumed it was suppose to be . What causes this problem? /forums/images/graemlins/1zhelp.gif
     
  4. twenty_below0

    twenty_below0 1/2 ton status

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    come on people help me out , what causes the gas in the advance ????
     
  5. Lonnie

    Lonnie 1/2 ton status

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    It is usually due to condensation from heating/cooling of the engine. The advance is lower than the carb, so this is a natural movement. I recommend putting a loop or (upside down "U") in the line to the vac advance. Fuel is heavier than air, so it should not get past the loop & drain back to the carb. Also try using manifold vacuum instead of ported.... it will provide better throttle response while preventing pinging under full throttle. (initial timing may need to be adjusted for best preformance)
     

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