1970 Z28 Engine idle problems

Discussion in 'Troubleshooting & Diagnosis' started by harkz28, Nov 5, 2017.

  1. Rayzorz

    Rayzorz New Member

    Mar 28, 2017
    Calgary Alberta
    If you changed cams with the rebuild it might be possible that torque converter is too tight and lugging it in gear.
    Crazy4camaro likes this.
  2. Crazy4camaro

    Crazy4camaro Veteran Member

    Dec 30, 2015
    Greenville SC
    I think your on to something now.:brightide
  3. rocket dawg

    rocket dawg Veteran Member

    May 5, 2015
    Grand Rapids Mi
    Yes, it may mean that the weight springs are sacked out or only 1 is in place. If a few hundred RPM's make a difference, especially at idle, then its time to freshen up the advance weights/springs. Only seen this once so its a long shot, but it doesnt cost you anything to try and it takes just a few seconds.
  4. harkz28

    harkz28 New Member

    Aug 22, 2005
    Got the idle problem pretty much squared away. Reset the timing and adjusted the idle screws on the carburetor with a vacuum gauge seemed to do the trick. I am having an issue at 70 miles an hour car feels like it's surging any ideas?
  5. COPO

    COPO Veteran Member Lifetime Gold Member

    Sep 15, 1999
    Ontario, Canada
    What are your plugs gapped at and what plugs are you using?

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