[TR] SU Fuel Problem

[Scott Suhring]

A friend of mine is having problems with his SUs that we just can't figure
out.  Here is what he is experiencing:

My 1970 TR6 is seeping fuel out of the rear SU float bowl overflow tube.
The SUs are a new Moss Motors conversion set.  I called Moss about the
problem, but they were no help.  I installed a heat shield, but that didn't
change anything.  I installed a new Moss fuel pump, but found that it was
putting out 7 lbs. of pressure.  I next installed a fuel pressure regulator
and dialed it down to 2 1/2 lbs.  I thought my problem was solved.  Today I
drove the car 140 miles in 86 degree weather.  While driving I thought I
could smell fuel and when I returned home, I popped the bonnet and could see
fuel dripping from the overflow tube and it continued to do so for a short
time after the engine was shut down.  Anyone have any ideas as to what is
causing the problem and how it can be solved?  I am stumped.

Thanks.

Scott Suhring
Mechanicsburg, PA
'70 TR6
'59 TR3