Adam wrote
Today, I tested fuel pressure. Followed Bentley instructions =
for
air-cooled
2 liter. at idle with vacuum line off, it ran 29 =
lbs. with
the vac line on, it ran
at 32 lbs. Book says should be 36, so =
put on
new regulator, same result.
Measured fuel flow from fuel pump. =
got 24
ounces in 30 seconds..........8
ounces more than half a quart.
HMMMM
So swapped fuel pump, and discovered that the system now holds =
pressure
when
I turn off the key. The old pump must've had a bad check
valve.
Does all of this seem normal now, or are their other issues I
have
overlooked
Adam
There are
two parts to testing the fuel pump pressure and flow you seem to have =
these
covered.
The other aspects of this problem is =
that with low
flow the fuel pressure drops as the RPM is increased.
With low flow or low pressure the =
engine leans out
at you have a power loss and the head temps increase.
this lean fuel condition could cut the =
engine life
to a couple thousand miles if that. This goes for both air and water
cooled
Bob Donalds
as always all rights =
reserved