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vacume leak on throttle body

Discussion in 'Chevy C/K Truck Forum' started by AC`s94chevy, Mar 20, 2013.

  1. AC`s94chevy

    AC`s94chevy New Member

    I have a vacume leak on the bottom of my throttle body and im pretty sure its the seal where the butter fly shaft goes through it.My question is how difficult are they to replace and where can I a diagram of the tbi?Thanks Aaron
  2. dsfloyd

    dsfloyd Epic Member 5+ Years ROTM Winner Gold Member 1000 Posts

    throttle body is typically easy to replace. as far as a diagram is concerned I dont know but did you try to google it.
  3. AC`s94chevy

    AC`s94chevy New Member

    I did find a diagram online of the throttle body thats used on my truck.I also gave a wrong description of the shaft where the bad orings are.Its the throttle shaft on the bottom of tb.Has anyone here ever replaced them?Am I going to have to get a complete rebuild kit for the TB?
  4. geo1

    geo1 Member 1 Year 100 Posts

    are you sure its shaft end seal?can you move shaft side to side?
  5. AC`s94chevy

    AC`s94chevy New Member

    Yes Im sure I sprayed carb spray in the area of the shaft and my idle will go up.Its also making a whistling noise from the same area.
  6. geo1

    geo1 Member 1 Year 100 Posts

    try to spray lithium at that spot,carb spray just dries things out,what was symptom to go looking there?
  7. AC`s94chevy

    AC`s94chevy New Member

    Doesnt matter what I spray I even tryed wd40 the symptoms dont go away.

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