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Vacuum Leak?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Catman, Jan 26, 2005.

  1. Catman

    Catman Registered Member

    Feb 4, 2003
    Likes Received:
    Yucca Valley, Calif.
    After blowing my heater core and plugging the lines I started getting a bad low RPM hesitation (and stalling) when cold. I've reset the ECM, no diff. When warming up in high idle and when up to about180 to 200 degrees it runs fine. I couldn't locate any vacuum leaks and everything else appears normal. Any ideas???:confused: :confused:

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