Piper PA-24 Comanche Service Manual page 484

PIPER COMANCHE SERVICE MANUAL
TABLE VIIC·D. TROUBLESHOOTING CHART (cont.)
(ENGINE·TtJRSOCHARGED)
Trouble C. . .
Remedy
Lou or reduaion of
Ruptured booIt pres-
CoftUnue operation IIntil
fuel pressure when sure reference line next lIDding if engine
turbocharging. (eent.)
to fuel pressure
is smooth; otherwise.
reculatinl valve.
reduce power to obtain
smooth encine opCftoon.
GroWld check fuel
system.
Engine runs hot (5
OO~
.\1ar be due to extreme Reduce power or open
or marc) when turbo-
hot weather. cowl flaps.
charging
or naturally
aspitated. Cracked or loose
eyl-
Repair or replace as
inder cooling air required.
battles.
Durilll c:1jmb.
Reduce power or open
cowl flaps or increase
Indicated Air Speed.
Ovcr-boost or RPM Reduce MAP or RPM.
roo hiJh.
Fuel mixture tOO lean Enric:hen mixture.
durin, very hot
weather.
Mis-timcd isnition.
Check ignition riming.
either recarded or adjUStas necessary.
pre-ignition.
Detonanon due to tOO Fuel mixture set
tOO
low octane fuel or lean or fuel eetane roo
item above. low. Cheek mixture
and fuel grade.
Faulty cyliftdcr head Replace instrumenr.
tempftlltutc ,auge.
Defective oil cooling Inspect and repait as
system. required.
Combinations of above.
SystemaocaJly elimi-
nate by above steps.
POWER PLANT
ISSUED: 8/18/72
2 18
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