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ok guys im still having problems with my 85 when i go up hills

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by cootersk5, Sep 4, 2004.

  1. cootersk5

    cootersk5 Registered Member

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    ok heres the story i bought an 85 blazer from a guy. dont ask me why but he put a 307 in it. well thatcame out and i bought a 350 from advance auto parts. i went through three engines i finally got one that didnt mess up some how. now heres my problem
    when im going up a hill and the tramission needs to downshift to get more power and then kicks back up a gear the truck kicking and bucking and acting like its flooding itsself or something. at first i thought it was my holley carb because the engine had blow back through it so i thought i had blown the power valve or what ever is in those that go all the time. so i put my edlebrock 600 on it and it was fine for about half the day and then started doing it again. so what do u all think. maybe the spark isgetting drowned out or the timing of a little off i dont know please help /forums/images/graemlins/grind.gif
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Make sure that the fuel filter is clean. If the carb doesn't get enough fuel to keep the bowls full then it will start to buck under heavy loads. /forums/images/graemlins/frown.gif
     
  3. cootersk5

    cootersk5 Registered Member

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    thanks i didnt even think of that /forums/images/graemlins/grind.gif
     
  4. Pookster

    Pookster 1/2 ton status

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    Had the same problem once with my 87- Fuel filter was clogged beyond belief. Replaced it and I reached a top speed of 107. /forums/images/graemlins/whistling.gif
     
  5. 79Stomper

    79Stomper 1/2 ton status Premium Member GMOTM Winner

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    Maybe even it could be the carb. My street carb hates anything off camber and will flood out and strand me and I have to ride the skinny pedal and the brake to make it over an obstacle so I am going to put the Q Jet back on it and be done with it, or atleast until I find a nice TPI set up.
     
  6. dontoe

    dontoe 3/4 ton status GMOTM Winner

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    Had the same problem with my Edlebrock carb and installed "spring loaded float needles" and never had another off camber problem. /forums/images/graemlins/waytogo.gif
     
  7. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    [ QUOTE ]
    at first i thought it was my holley carb because the engine had blow back through it so i thought i had blown the power valve or what ever is in those that go all the time. so i put my edlebrock 600 on it and it was fine for about half the day and then started doing it again.

    [/ QUOTE ]

    What tranny , if you are running the 4 speed auto , and chances are it came with highway gears , no carb will fix that . Just leave it in 3rd , or manually downshift , and deal with it sucking on hills until you get lower gears in the axles . The tranny is probably downshifting , gaining some speed , and upshifting again , then you lose momentum and it kicks down again .

    Just a thought /forums/images/graemlins/k5.gif /forums/images/graemlins/k5.gif
     
  8. beater_k20

    beater_k20 Banned

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    right on, lower gears are your answer.
     

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