Hello,
If you have not found the problem, try this. Take off the air cleaner.
Run the engine up to 2000 rpm. Then stick your finger in the mouth of the
carb and carefully and slowly lift the slide with your fingernail, try to
keep your finger out of the air flow. If raising the slide increases the
engine speed then you are running too rich. Do one carb then the other to see
which one has the problem. Running too lean at speed will usually cause a
stumble. Check for a sticky choke and double check the air flow sync.
keith williams
>
> 1600 SU carburetor question
>
> Can someone help me to determine what might be wrong with my car? The
> engine bogs down when warmed up and running at about 2000 rpm's. It also
> seems to be eating the oil that lubricates the needles. (top hand tightened
>
> caps at the top of the carburetor). I am using a light transmission oil in
> the carburetors. It sound like the air and fuel mixture might be wrong. It
> was running smooth when driven to the Glen in September. All of a sudden
> this happens. The carburetor has all new needles, jets and gaskets prior to
>
> the trip in September.
>
> Thanks in advance for your help.
>
> Nick
> 1966 1600
>
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