Piper Comanche PA-24 Service Manual page 515

PIPER COMANCHE SERVICE MANUAL
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Failure of ""Iinc to
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TABLE VlIA-W. TROUBLESHOOTING CHAllT
(ENGINE) (FUEL INJECTION)
c.u..
L..,k of fuel.
lJDClerprimiDJ·
O""'l'rilniDI·
I ncorrect throttle
.. <ting.
Defective sparle plup.
Dcfectiw battery.
Improper operation of
magneto breaker poinu.
Air bubbles in fuel sysrem.
Fuel pump failure.
Fuel line restricted.
Lack of sufficient fuel
pressure.
I ntemal foilu ....
Clogged injector nonles.
DefectIVe igninon wire.
2
E13
RCIIIIdy
Check fuel system for lealts.
Fill fuel tank. ClaD
ctirty
liDa.
strainers or
fuel cocks.
Prime by boldiq boo. pwnp
switch 4 10 10 seconds.
Place conaal in ooidlc<ut·
off". Open throttle and
wW>aai
engine by ruming
over with surter
Open thronic to
1/8
of its
range.
Clean and adjUSt or replace
sparle plug or plup.
Replace with charged
barrcry.
Clean points. Check internal
timing of magnetos.
Check fuel Yent.
Replace pwnp.
Cbeck inlet line.
Check fuel strainer and fuel
adjusanenu.
Check oil sump strainer for
mc-.ai particles. If found.
complete overhaul of the
engine may be required.
Remove from cylinden. dean
in acetone solvent. blow
through the injector nozzle
opposite direction of fuel
flow with compressed air.
100 psi.
Check with electric te~ter.
and repla.ce any defective
wires.
POWER PLANT
ISSUED: 8118n2