Piper PA-24 Comanche Service Manual page 430

PIPER
COMANCHE SERVICE
:\1A~t·
AL
TABLE \"IIB-II. TROL'BLESHOOTI'G CHART (E'G"E)
•
2G2
tsst
ED. 8/18/72
Trouble
Cause
Remedy
Failure of engine to
Lack of fuel.
Check fuel system for leaks.
start .
Fill fuel tank. Clean
dirty lines. strainer or
fuel cocks.
L'nderpriming. Prime by holding boost pump
switch 4 to 10 seconds.
Overpriming.
Place control in "idle-cut-
off." Open throttle and
unload engine by turning
over with starter.
Incorrect lh rottle setting.
Open throttle to I 8 of its
range.
Defective spa rk plugs.
Clean and adjust or replace
spark plug or plugs.
Defective battery.
Replace with charged
battery.
Improper operation of
Clean points. Check internal
magneto breaker points.
timing of magnetos,
Air bubbles in fuel system. Check fuel vent.
Fuel pump failure. Replace pump.
Fuel line restricted.
Check inlet line.
Lack of sufficient fuel
Check fuel strainer and fuel
pressure. adjust ments.
Internal failure.
Check oil sum!" strainer Ior
metal particles. If found.
complete overhaul of the
engine may be required.
Clogged injector nozzles,
Remove from cylinders. clean
in acetone solvent. blow
through the injector nozzle
opposite direction of fuel
flow with compressed air.
100 psi.
Defective ignition wire.
Check with electric tester.
and replace any defective
" Ires.
POWER PlA'