Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

smog test

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by mdm365, May 11, 2002.

  1. mdm365

    mdm365 1/2 ton status

    Joined:
    Jul 2, 2001
    Posts:
    536
    Likes Received:
    0
    Location:
    mineral wells wv
    I went and did my smog and the tech told me the co is to high it was 6.2 and it has to be 2.5 or under.the idle is just under 800 rpm and it will not go down.I have a new 350 gm engine with a q-jet.no vacume leaks and the carb has been rebuilt,the float level has also been rechecked.give me some ideas I got to get passed !! thanks everyone mike.
     
  2. chris672

    chris672 1/2 ton status

    Joined:
    Jan 25, 2002
    Posts:
    554
    Likes Received:
    0
    Location:
    LODI, CA
    Did the smog tech give you any suggestions?
     
  3. mdm365

    mdm365 1/2 ton status

    Joined:
    Jul 2, 2001
    Posts:
    536
    Likes Received:
    0
    Location:
    mineral wells wv
    he did not say much what he said was bring the idle down but it wont,the idle adjustment is not even touching and still stays just under 800 rpm.I checked the timming,readjusted the carb and the float level also the vacume advance.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    How's your vac advance hooked up? Full manifold vac will bring up the initial advance, so idle/mix at idle will have to be modified. Generally, advancing timing increases engine RPM at idle.
     

Share This Page