I just wanted to mention that i had a similar problem with my 73B that
has Hif4 carbs on it. Just like you said that after you replaced tehm,
the problem went away.teWell when I bought the car the PO would just
drive around with the choke pulled in order to keep it running. The
first thing I did was to tear the carbs down, blow them clean, reinstall
them and adjust the mixture and the car an fine. Since then the problem
has arisen twice. I then came across a publication (can't think of where
or what) that stated that the HIF4 carbs needle value's have a tendancy
to not seat properly. IMHO this may be the problem. Moss sells a
replace fro these which employ a ball instead of the needle for better
sealing. In the future I plan to replace them with the new seat.
Marten 73B
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