
Trouble
Cause
Remedy
No fuel pressure indication.
Fuel valve stuck.
Check valve.
No fuel in tanks.
Check fuel level and fill.
Defective fuel pump.
Check pump for pressure
build up. Check diaphragm
and relief valves in engine
pump. Check for obstructions
in electric pump. Check by-
pass valve. Air leak in intake
lines.
Defective gauge
Replace gauge.
Failure of fuel selector to
Check position of selector
be in proper position.
and adjust if required.
Pressure low or pressure
Obstruction in inlet side
Trace lines and locate
surges.
of pump.
obstruction.
Faulty by-pass valve.
Replace.
Faulty diaphragm.
Replace or rebuild pump.
Unidentified leak.
Fuel line damaged or
Locate and repair or tighten.
improperly installed.
Fuel valve leaks.
Worn O-rings.
Replace O-rings or valve.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
FUEL SYSTEM
2B2
TABLE IX-III. FUEL SYSTEM TROUBLESHOOTING (cont)