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.

got a problem with a 4.3

Discussion in '1983-2005 S-Series models' started by nkldrgr, Apr 20, 2005.

  1. nkldrgr

    nkldrgr Registered Member

    Joined:
    Apr 20, 2004
    Posts:
    54
    Likes Received:
    0
    Location:
    Seattle, WA
    My buddie has a 97'ish s10 blazer 4x4 with a vortec 4.3L. when he starts it, it runs spurattic. The idle jumps around a bit. Also, it is puffing blueish smoke. I know that its not burning all the fuel, but not sure why. When it gets warm, it goes away. It failed smog by what he called "bad low idle emmissions". My guess is a bad cold start valve, but I don't know if those trucks even have that. Any Ideas??? Any ideas are greatly appreciated.
     
  2. 86chevybanshee

    86chevybanshee 1/2 ton status

    Joined:
    May 15, 2004
    Posts:
    917
    Likes Received:
    0
    Location:
    beverly MA
    does it have cpi?
     
  3. 1979jimmy350

    1979jimmy350 1/2 ton status

    Joined:
    Mar 24, 2004
    Posts:
    3,069
    Likes Received:
    0
    Location:
    Ann Arbor Mi
    you might want to check the o2 sensors. really you best bet is to get it hooked up to a scan tool and that would tell you what is wrong. Also check to make sure you are getting good spark
     

Share This Page