Fuel Pressure Gauge Troubleshooting - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
11·57. Fuel Prwure Gause.
11·58. General. The fuel pressure lauge instrument is mounted in the cluster On the innrumcnt panel. This
gau,e is connected to the fuel
systcrn
at the engine driven fuel
pum~.
on the
PA·Z+-180.
while on the.
PA-Z+-250. PA-Z4-Z60 and PA·Z+-400 it is connected
at
the carbumor or inJector fuel inlet fitting.
11·59. Removal And Replaccment. Refer
to
Patap'lph
11-Z0
of this section.
11-60. Troubleshootinl.
TABLE XI·XI. FUEL PR.ESSURE GAUGE
Trouble Cause
Remedy
No fuel pressure indio Fuel valve sNck.
Check valve.
cation,
No fuel in tanks.
Check fuel. fill.
Defective fuf!1 pump.
Check pump for pressure
build up. Check diaphrarm
and rdief valves in en-
I
line pump. Check for ob·
strUction in electric pump.
Check bYl'us valve. Air
leak in intake lines.
Defective puge.
Replace ,aulc.
Pressure low or pressure Obstruction in inlet side Tract lines and locate
surges. of pump. obstrUction.
Faulty bypass valve.
Replace.
Faulty diaphragm. Replace or rebuild pump,
Seedle fluctuation.
SUl'le dome on pump filled
Remove and empty.
with fuel.
INSTRUMENTS
ISSUED: 8/18/72
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