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Big Block Dieseling

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  • Benjamin C.
    Very Frequent User
    • July 31, 1994
    • 134

    Big Block Dieseling

    Anyone have any tips on stopping a 427/435 from dieseling. I have just finished some work on the engine. I use high octane fuel. I have replaced the plugs, plug wires, the three carbs have been reconditioned, new gaskets, the timing has been set. Before all this work was done it was very bad. After this work was done it is much better, but it still diesels a little.
  • Mike M.
    NCRS Past President
    • May 31, 1974
    • 8377

    #2
    Re: Big Block Dieseling

    what RPM do you have it idling at? mike

    Comment

    • Duke W.
      Beyond Control Poster
      • January 1, 1993
      • 15645

      #3
      Re: Big Block Dieseling

      Convert the ported vacuum advance to full time, which is simple/inexpensive to do. Do a little archive browsing, including a thread by Rich Snow last June. Use search words "L-71", "VAC" and VC1765". You will need a different than OE VAC, which is explained along with why this conversion is likely to solve overheating/runon problems - EGT, combustion chamber boundary temps, etc.

      Duke

      Comment

      • Richard S.
        Very Frequent User
        • November 1, 1994
        • 809

        #4
        Re: Big Block Dieseling

        You will not believe how much better your 435 will run if you do as Duke recommends........what a wonderful difference......thanks again Duke.

        Comment

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