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Thread: Backfire and stalling

  1. #1

    Default Backfire and stalling

    I’ve recently starting having a backfire when letting off the gas, mainly in third gear and when I come to a stop it wants to stall. It will idle fine but if you rev the engine and let it return to idle it stalls out. Any ideas where to start? Timing, carb, exhaust?
    Thanks
    1969 series 2a
    2.25 gas
    Electronic ignition

  2. #2
    Join Date
    Sep 2010
    Location
    killingworth CT
    Posts
    836

    Default

    Check Idle RPM's, is setting screw set to low?
    Timing, is Ignition timing correct?
    Look at filters, are they clear? Does carb have a filter?
    Plugs, are plug gap correct?
    Could be a myriad of items, choose one and follow through.

  3. #3
    Join Date
    Jul 2020
    Location
    UK
    Posts
    300

    Default

    Possibly a slight air leak, carb. to manifold or manifold to head.

  4. #4
    Join Date
    Dec 2010
    Posts
    395

    Default

    vacume advance? often though it's vacume leaks.

  5. #5
    Join Date
    Apr 2009
    Location
    Bozeman MT
    Posts
    705

    Default

    Quote Originally Posted by cedryck View Post
    Check Idle RPM's, is setting screw set to low?
    Timing, is Ignition timing correct?
    Look at filters, are they clear? Does carb have a filter?
    Plugs, are plug gap correct?
    Could be a myriad of items, choose one and follow through.
    +1 on this post. Think about the engine as a chain. Look at each link in the chain and rule it out.

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