Low fuel pump pressure can cause low float bowl levels.  Easier for the
float to shut off two psi of fuel pressure than 6 psi.  However, R2 fuel
pump flow problems usually manifest themselves in the higher rpm ranges
first.  Usually it will accelerate strong off the line and run out of fuel
at about 3 or 4k rpm as boost builds above the fuel pump output.

Two ways to check fuel pump flow:

1. For low rpm problems like yours, insert a clear plastic fuel filter just
before the carb.  Only costs a few bucks and can be removed if you are
trying to keep things OEM.  The filter should stay more than half full and
when the engine is running, show consistent surges of fuel flow as the pump
cycles.

2. For high rpm problems, buy a vacuum/pressure test guage (less than $20)
put a tee in the fuel line, connect the guage, run its rubber hose out the
side of the hood and tape it to the rear view mirror.  Do not run a
pressurized fuel line into the cockpit with you!  Run the car up to the
rpm/load where the problem exists. The guage should show at least 6 psi more
than the boost level

Jack Vines <jackv@studentambassadors.org>
11/17/00 04:45 PM