Piper Comanche PA-24 Service Manual page 517

PIPER COMANCHE SERVICE MANUAL
Trouble
Low power UId 1lD~
running. (cont.)
Flow meter roads high.
F ail"",
of engine to
develop full power.
Rough cngine.
TABLE VllA·lll. TROUBLESHOOTING CHAllT
(ENGINE) (.VEL INJECTOR) (cont)
Cauo
Lcai< in lDauction SYRem.
Poor fuel.
M.."ero breaker poina
not workint properly.
Defective ipition wire.
Improper ignition
timint.
Defective ",ark plug
term.iDa.l
C:OlIDecton.
Incorrect valve clearance.
Clogged noule.
Throttle lever nut out
of adjllSanent.
Leak.
U1
inducc.on system.
. \tixnuc
tOO
lean.
Throttle
link.,.
limiang
<nvcl of throttle valvo.
Restrictions in inlet air
scoop.
Improper fuel.
F.ulry ignition.
Cracked engine mount.
Unb&1.nced propeUer.
Defective mounting
bushings.
2 E15
Rca If
Tiptcn all conncctJoDS.
Replact: defective parts.
Fill tank with~fuel of
",commended grade.
Clean points. Check intemal
timing of
m..,.eros.
Check wire with electric
rester. Replace defective
wire.
Check
~etoS
for
timint
aDd synchronization.
Rep1a.ce c:onnc:cton on spark
pi", wire.
AdjUSt valvo cleannce by
changing push rods.
Remove and flush with ....
tone. Blow tbro",h orifice
with compressed air • 100
psi.
AdjUR throttle lever.
Tighten intake pipe mounting
fIangc
nua wd rignten
intake manifold.
Injector must be recalibrated .
Check throttle link .. e ond
throttle valve OpenIng.
Examine &it scoop and
remove resttictions.
Fill tank with recommended
aviation fuel.
Tighten all cOMcctions.
Check sYStem Wlth tester.
Cbeck IgnItion nming.
Replace mount.
Remove propeUer and nave
it checked for b.lance.
Install new mounting
bushin!'.
POWER PLANT
ISSUED:
8118m