Piper COMANCHE PA-24-180 Service Manual page 397

PIPER COMANCHE SERVICE MANUAL
TABLE VIIA-I
I
. TROUBLESHOOTING CHART
(ENGINE) (FUEL INJECTOR) (cont)
Caue
Trouble Remedy
Low power aad uneven
running. (cont.)
Leu
in
mnduclon system.
Poor fuel.
Mapeto breaker points
not working properly.
Defective ignition wire.
Improper ignuion iming.
Defective spark plug
terminal connecton.
Incorrect valve clearance.
Tighten all connectons.
Replace defecive prts.
Fill tank with fuel of
recommneded grade.
Clean poinn. Check internal
timing of magnetos.
Check wir with electric
ester. Replace defective
wire.
Check magneos for timing
and synchronization.
Replace connectors on spark
plug wire.
Adjust valve clearance by
changing push rods.
Flow meter reads high.
Failure of engine to
develop full power.
Clogged nozzle.
Throttle lever nut out
of adjustment.
Leak in induction system.
Mixture too lean.
Throttle linkage limiting
tavel of throttle valve.
Restrictons in inlet air
scoop.
Improper fuel.
Faulty igniton.
Remove amd flush with ace-
tone. Blow through orfice
with compressed air - 100
psi.
Adjust throttle lever.
Tighten intake pipe mounting
flange nuts and tighten
intake manifold.
Injector must be recalibrated.
Check throttle linkage and
throttle valve opening.
Examine air scoop and
remove restctions.
Fill tank with recommended
aviation fuel.
Tighten all connections.
Check system with resaer.
Check ignition timing.
Rough engine. Cracked engine mount.
Unbalanced propeller.
Defective mounting
bushings.
Replace mount.
Remove propeller and have
it checked for balance.
Install new mounnng
bushings.
POWER PLANT
ISSUED: 8/18/72
2 E15