Piper Arrow IV Turbo Maintenance Manual page 319

FUEL PRESSURE GAUGE.
The fuel pressure gauge instrument is mounted in the cluster on the instrument panel. This gauge is
connected to the fuel system at the carburetor fuel inlet fitting.
Trouble
No fuel pressure indication.
Pressure low or pressure
surges.
Needle fluctuation.
High fuel pressure with
engine shut off right after
flight.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
CHART 2804. FUEL PRESSURE GAUGE
Cause
Fuel valve stuck.
No fuel in tanks.
Defective fuel pump.
Defective gauge.
Obstruction in inlet side of
pump.
Faulty bypass valve.
Faulty diaphragm.
Surge dome or pump filled
with fuel.
Air in line.
Fuel in line expanding due
to heat buildup in cowling.
—END—
2B16
Remedy
Check valve.
Check fuel, fill.
Check pump for pressure
buildup. Check diaphragm
and relief valves in engine
pump. Check for obstruc-
tion in electric pump. Check
bypass valve. Air leak in
intake lines.
Replace gauge.
Trace lines and locate
obstruction.
Replace.
Replace or rebuild pump.
Remove and empty.
Loosen line at gauge, turn
on electric pump. Surge
line of air and retighten.
Normal.
28-40-06
Page 28-21
Revised: December 1, 1978