Piper Comanche PA-24 Service Manual page 614

Trouble
Loss or reauction of
fuel pressure wilen
rurbocharging. (cont.)
Engine runs hot (500'
or more) when turbo ..
charging or natura.lly
aspint.d.
POWER PLANT
ISSUED: 8/18/72
PIPER COMANCHE SERVICE MANUAL
TABLE VIIC·D. TROUBLESHOOTINC OfAllT
(cont.)
(ENCINE·TURIIOCHAJtGED)
C .....
Remedy
Rupaami boOSt pres-
Continue operation until
su ...
ref ....
nce line
next landing if enJir!. -
to fuel p ....... r. is smooth; otherwise.
rqulating valy •.
reduce power to obtain
smooth qine operation.
Ground ch.ck fu.l
S}'1tcm.
,\lay be due to extreme
Reduce power or open
hot woo,," cowl flaps.
eneked or loose cyl-
Repair or replace as
inder cooling
W'
required.
baffles.
Owing climb. Reduce power or open
cowl flaps or increase
lndicat.d Air Speed
Over-boost or RPM R.duce.\IAP or RPM
roo high.
Fuel mixture
tOO
lean Enrichen rnixmre.
during Yery hor
",yutber
Mls~imed
ignition. Check ignition tUning,
either retarded or a.djust as necessary
p ... ..gnition.
Detona.tion due to too
Fuel mixture set
tOO
low octa.nc fuel or
lean ar fuel octane
tOO
Item lbovc. low. Check mixture
md fu.l grad.
Faulty cylinder
~
.. d Replace
Insttumcnt
temperature gauge.
Defective oLl cooling I nspeer Utd rcpall' as
system.
required.
Combinations of above
S~stematJc.ally
elimi-
nate by above steps.
2 18