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1986 2.8L running rough

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  • 1986 2.8L running rough

    When starting my 86 2.8L carburetted engine it is running fine. Until the automatic choke is warmed up and full open, then it starts hesitating and running rough.
    What could be wrong with it?

  • #2
    When was the last time it was rebuilt?

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    • #3
      Just bought the car! So could not tell. I assume You mean the carb?

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      • #4
        Spray it with some carb cleaner and put some fuel system cleaner in the tank and see if that helps.
        95 Beretta 3100 with 3400 intakes and TCE TB
        High flow cat and a Magnaflow muffler
        Grand Prix trans with 3.33FDR

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        • #5
          Run some seafoam into the vacuum system, and pour some into the bowl vent on the carb.
          I just did this last week, man what a differerence!
          Honestly though, the carb probably needs a rebuild.

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          • #6
            Rebuild? I am thinking a new one.
            I have a Rochester vari-jet 2 barrel (E2SE).
            To replace this one which can you advise me and where for sale?

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