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Mixture Control Solenoid

Discussion in 'EEK!FAQ' started by slim slow slider, Oct 17, 2020 at 10:42 AM.

  1. slim slow slider

    slim slow slider Well-Known Member

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    Am thinking part of the problem I am having trying to get my 84 Reliant (2.2) to idle properly. I have installed a filter between the canister and the inlet to prevent charcoal debris from entering the carb bowl. Carb is rebuilt; done by professional builder. Previous carbs have operated beautifully.

    Would welcome advice and help from someone who has experienced problems or suggestions.

    Much Appreciated!!
     
  2. AllanC

    AllanC Well-Known Member

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    You are assuming a lot that the carburetor is set properly because it was done "professionally". Hopefully all the passageways are clean. Attached document lists troubleshooting tips for 1984 FWD Chrysler vehicles with carburetors.

    Driveability Issue Carburetor Vehicles 1984.gif


    You need to check that the internal mechanical parts such as valves and pistons are still in good condition. I would suggest running a compression test and determine if all cylinders have the potential to contribute equally for a smooth running engine.
     
  3. slim slow slider

    slim slow slider Well-Known Member

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    Thanks for the list. I'll check it out.
     
  4. GLHS60

    GLHS60 Well-Known Member

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    Many add a fuel filter between the canister and carb but that doesn't cause issues.

    Your problem lies elsewhere.

    Thanks
    Randy
     
  5. ImperialCrown

    ImperialCrown Moderator
    Level III Supporter

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    The Mixture control solenoid has nothing to do with the idle fuel metering.
    It comes into use at closed loop, part-throttle operation.
     
  6. valiant67

    valiant67 ...

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    These were problematic when new. The swap to TBI in later years was a blessing.
     
  7. slim slow slider

    slim slow slider Well-Known Member

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    Randy: Give me some ideas on how to proceed. Two rebuilt carbs, same issue. Some has said the mounting plate is warped, or bottom of carb is warped. Problem just suddenly developed. Car ran like a dream, then would not idle correctly and no power under a load. Appreciate your knowledge and insight.
     
  8. GLHS60

    GLHS60 Well-Known Member

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    Slowly close choke when idling warm to see if it smooths out any.

    Then perform any vacuum leak tests you can in any way you can.

    Try propane, starting fluid, WD40, brake clean, oil squirt can etc.

    Check every vacuum hose from carb/manifold vacuum source.

    Then, perform the secret Milwaukee carb test procedure.

    Rev Engine over 3,000 RPM and hold choke plate closed.

    Open choke just before Engine stalls, let idle, free rev, repeat.

    Increased Engine vacuum might pull crud from carb circuits.

    Sudden problem is often a vacuum leak.

    Loss of power is often internal.

    Or retarded cam/ign timing.

    Thanks
    Randy
     
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  9. GLHS60

    GLHS60 Well-Known Member

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    WOW !!!

    That's a big help, so gallant of you to share your wisdom.

    I'm not sure anyone else even knows this well hidden secret.

    ATTENTION ALL: TBI WAS A BLESSING

    Thanks
    Randy




     
  10. slim slow slider

    slim slow slider Well-Known Member

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    Randy: Great suggestions!! You Rock!!!
     

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