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Engine losing power going up hills

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BAMA74K5, Sep 16, 2001.

  1. BAMA74K5

    BAMA74K5 Registered Member

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    My engine wants to die out when I go up a hill. It does not completely die unless I take my foot off the gas. When I get it back on flat ground it runs and idles fine. I have a 350 with a Q-jet that I just rebuilt. Any help would be greatly apprectiated.

    Rush
     
  2. Big blue ox

    Big blue ox Registered Member

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    Did you check the float adj. after the rebuild?
     
  3. Burbinator

    Burbinator 1/2 ton status

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    I agree with Big Blue. Sounds like a misadjusted float causing a fuel shortage in the bowl when the pitch angle of the vehicle changes. Had a similar problem with my Sub a few years back.

    - Alan

    '82 K10 Suburban Silverado
     
  4. BAMA74K5

    BAMA74K5 Registered Member

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    Yes I did adjust the float to 5/16 from the top of the bowl. I had adjusted it more at one time but it made gas come out the top of the carb. Is 5/16 not enough or could there be another problem. Thanks for the help.
     
  5. TorkDSR

    TorkDSR 1/2 ton status

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    this may sound insultingly silly, but is the carb bolted down tight? ihad one rebuilt then put it on and a week later the damn thing unscrewed itself from the manifold, and air was leaking on the otherside of the carb. i felt dum, realllly dum, dummer than the way dum looks, dumb dumb dumb

    Tork DSR
    I just got a winch, it takes the fun out of things.
     
  6. yeild2me

    yeild2me 1/2 ton status

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    BAHAAAAAHHAHAHAHA..i agree, one time my TBI gasket disenegrated and my truck would not idle, it would run fine on the hi-way and at any speed, but idle was just rough and nasty. i replaced plugs, wires, cap, rotor, etc.,etc,........then while cleaning my TBI up w/some carb cleaner, i noticed the engine would rev up when the carb cleaner was sprayed in that area. $3.17 and 10 minutes later it was good as new.

    i guess my point is...same principle different problem..

    350 TBI, 700R-4, NP241, D44-14FF, 4:10's, 38.5 TSL/SX's, full conv., full cage
    <a target="_blank" href=http://www.yeild2me.rockcrawler.com>www.yeild2me.rockcrawler.com</a>
     
  7. Neil

    Neil 1/2 ton status

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    Ah Ha! A fellow Alabama K5 owner. Thought I was all alone on this site here for a while. hehehe.

    Neil H. Alabama.. "It's a full size thang, Jeep owners don't understand!!" '78 K5 400ci 4x4 AT,AC,PW Cheyenne., '74 C10 4x2
     
  8. Neil

    Neil 1/2 ton status

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    I had a similar prob with a 84 K1500 swb 350 AT. was the fuel pump going bad. just and idea to check. it stalled/choked under load. good luck.

    Neil H. Alabama.. "It's a full size thang, Jeep owners don't understand!!" '78 K5 400ci 4x4 AT,AC,PW Cheyenne., '74 C10 4x2
     
  9. BAMA74K5

    BAMA74K5 Registered Member

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    Thanks guys for all your help. I have got an interview today so I might not have time to work on it. I will try everything ya'll have suggested. Thanks again.

    Rush
     
  10. Neil

    Neil 1/2 ton status

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    well let us know what's up..........

    Neil H. Alabama.. "It's a full size thang, Jeep owners don't understand!!" '78 K5 400ci 4x4 AT,AC,PW Cheyenne., '74 C10 4x2
     
  11. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Fuel filter. It's restricting the flow of fuel to the float bowl and running dry under load. You may also need a fuel pump.

    It's not my damn planet monkey boy!
    <a target="_blank" href=http://communities.msn.com/OffroadK5s>communities.msn.com/OffroadK5s</a>
    75 Jimmy, Dollar
    79 Chevy Blazer, Her's
    70 Chevy Burb
    Grim-Reaper
     
  12. Burbinator

    Burbinator 1/2 ton status

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    Here's another thought, too. Possible that a plug wire is arcing to ground, an adjacent plug wire, or loose on the distributor tower/plug itself. Could be a bad wire. That would more than likely be evident under all driving conditions, but at least you could rule it out fairly easily. Fuel filter or pump seems more probable.

    - Alan

    '82 K10 Suburban Silverado (AKA U.S.S. Nimitz)
     

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