Piper COMANCHE PA-24-180 Service Manual page 485

PIPER COMANCHE SERVICE MANUAL
TABLE VIIC41. TROUBLESHOOTING CHART (cor.)
(ENGINE-TURBOCHARGED)
Trouble Cume
Remedy
Los of. reduction of.
or fluctuation of
manifold pressure
while rurbochrging.
Malfunctioning rnu-
fold pressure gauge
due to faulty auge or
possble oil in MAP
reference line or
sCe.
Turbochrger inlet
duct blocked.
1 urbocompressor dir-
charge duct ruprured
or disconnected.
Severe rupture on ex-
haut sscks causing
wae gare to be in-
effective.
Turbocharger rotor
jammed.
Ruptured manifold
gauge line or fimng.
Broken wase gate
control.
Repair or replace
gauge. NOTE: If the
engine changes in
power level or the air-
speed changes, then
actual change in MAP
occurred due to
one of the reasons
lited below:
Check ducting and re-
move obstruction.
Connect or replace
ducting.
Replace defective par.
Replace Turbocharger.
Repair leak.
Replace control cable.
Loss or reduction of
fuel pressure when
rurbochargng
Out of fuel.
Paral fuel vapor lock
it high altitude due to
hot fuel and high power
sermngs.
Malfunctionmg fuel
pressure regulaing
valve or fuel pump.
Ruptured fuel line or
leaking fining or
pump shaf seal.
Refuel.
Turn on boost pump
and/or reduce power.
Turn on boost pump
and/or reduce power
Shut off fuel shut-off
valve, full nch mixture
unal fuel forward of
firewall s consumed by
engine. Secure engine.
POWER PLA.T
ISSUED: 8/18/72
217