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Thread: idle way high

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  1. #1
    Jr. Mechanic
    Join Date
    Aug 2006
    Location
    Wesley Chapel, Fl
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    Default idle way high

    ok so my mechanic pointed out to me today that my idle is way too high is there a way i can adjust it? it is a 1989 chevy suburban 350 5.7 tbi

  2. #2

    Default

    Idle in the TBI is controlled by the computer, and other things. Not real familiar with these newer fuel injection systems so I will leave it for more informed members.

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  3. #3
    Jr. Mechanic
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    Aug 2006
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    Default

    ok well my mechanic said its most likely the throttle body gasket and if he's not right eh 2.99 from autozone...

  4. #4
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    TrailLeadr's Avatar
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    Jun 2005
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    Coventry, Rhode Island
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    Default

    It should idle around 700-900. What's it at?
    Patrick
    Rhode Island


  5. #5
    Jr. Mechanic
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    Default

    idk exactly but its really high

  6. #6
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    dwill3015's Avatar
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    Default

    My 87 TBI 350 idles high because the main housing gets worn out where the main butterfly shaft runs through it so it hangs up and keeps the throttle cracked open a bit causing the high idle. If I quickly pop my foot on the pedal and let it pop up it will idle down to normal. I have been told you can have it worked over for a couple of hundred clams but I may just go with a aftermarket TBI instead.
    Darcy
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

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