Tahoe question

Discussion in '1992-Present Chevy & GMC models' started by oatsk5, Sep 5, 2020.

  1. oatsk5

    oatsk5 1/2 ton status Premium Member GMOTM Winner

    Joined:
    Aug 18, 2002
    Posts:
    2,014
    Likes Received:
    244
    Location:
    Grand junction CO
    I have a 99 tahoe with 5.7. I just replace the fuel regulator and the gasket for the top half of the plenum. Now it idles at 2000 and has super high vacuum. If I pull the intake hose off the tb it idles down. The vac is hard enough if ya pull the pcv valve out of the valve cover it will suck it right back in. Any input im at a loss.
     
  2. b454rat

    b454rat 1/2 ton status Premium Member

    Joined:
    Jan 21, 2003
    Posts:
    3,336
    Likes Received:
    104
    Location:
    Binghamton NY
    Got a leak somewhere. Maybe double check around the base, may have pinched a hose or wire...
     
  3. oatsk5

    oatsk5 1/2 ton status Premium Member GMOTM Winner

    Joined:
    Aug 18, 2002
    Posts:
    2,014
    Likes Received:
    244
    Location:
    Grand junction CO
    Copy
     

Share This Page