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Thread: Oscillating idle
          
   
   

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  1. #16
    BBMonte's Avatar
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    Quote Originally Posted by BigTruckDriver
    Get a vacuum gauge, they are pretty cheap. Hook it up to the intake and read the movement of the needle.

    i have one
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  2. #17
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    Does sound like super lean or a vacuum leak... you said vac is at 22"? Then over lean more likely.

    How much cam you got? Might just want a higher idle?

    Two cents...

    -Chris

  3. #18
    BBMonte's Avatar
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    my cam is 216/216 @ .05 .515 lift
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  4. #19
    BBMonte's Avatar
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    vacuum is reading from 20 to 15 @ idle

    and the vacuum is @ 22 @ 1,500
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  5. #20
    BBMonte's Avatar
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    i thought u want the highist vac when u are tuning your carb?
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  6. #21
    NTFDAY's Avatar
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    If you're running power brakes and I'm assuming you are, I'd plug the line to the brake booster and one by one check any and all vacuum lines. A leaky cannister under the dash could cause your problem.
    Ken Thomas
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    The simplest road is usually the last one sought
    Wild Willie & AA/FA's The greatest show in drag racing

  7. #22
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    cam looks tame enough... yes, you want highest vac at lowest revs (or whatever revs you want idle at)...

    Did it run ok in the past? Are all the cylinders firing (plugs, wires, caps)?

    -Chris

  8. #23
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    this is a rebilt engine and it isnot in the car yet thats for next year
    Last edited by BBMonte; 09-22-2007 at 06:55 PM.
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  9. #24
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    Sure your not runnin' Injected Alcohol? J/K
    "PLAN" your life like you will live to 120.
    "LIVE" your life like you could die tomorrow.

    John 3:16
    >>>>>>

  10. #25
    BBMonte's Avatar
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    Quote Originally Posted by pro70z28
    Sure your not runnin' Injected Alcohol? J/K

    umm? i dont think so
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  11. #26
    BBMonte's Avatar
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    one of my frends was telling me it might be my vavles there not closing all the way? when i set preload i did 1/2 turn on the wrench. what do u guys think?
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  12. #27
    BBMonte's Avatar
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    well what would that do?
    Last edited by BBMonte; 09-23-2007 at 09:33 AM.
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  13. #28
    BBMonte's Avatar
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    well yeah that dusint sound like what i am doing
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  14. #29
    BBMonte's Avatar
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    well me and my friend were looking at the engine and tring to figure out what is up with it. well i tried to spray carb claener down the carb in little squirts and it seemed to smoothe out but when i tried propane or mapp gas nothin.... i am tring to beleave it isn't a vac leak becuse i have seelant on every thing. so i think it is a leen out on the idle but on 3 carbs?
    a another thing i am thinking is might it be that my timing set is off?
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  15. #30
    BBMonte's Avatar
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    i posted befor the site whent down and just wont to make shure ppl see this
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

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