Piper PA-24 Comanche Service Manual page 394

PIPER COMANCHE SERVIce MANUAL
TABU VlIA-ID.TROUBLESHOOTING CHAJt.T
(ENGINE) (FUEL INJECTOR) (conI:)
Trouble
ea.u..
Remedy
Failure of enaiDe
[I)
Incorrect idle adjustment.
Adju. throttle Stop to obtain
idle pro9crly.
correCt idle.
Insufficient fuel prasure.
Check fuel stniner and pump
pressure adjustment.
CI"IPd injector nozzles.
Remove and flush with acetone.
Blow mroul" orifice with
compressed air - 100 psi.
Leak in induction
systCft'l. Tilinen all connections in
the induction system. Re-
place any defective pans.
Low cylinder compression.
Check condition of piston
rings
and valve scatS.
Faulty' ipition system.
Check entitc ipition system.
Low power and Ilnewn
,\tixture too ricb; indicated
InjeCtor may need recall·
l"'Jnning.
by slugish enJine epee-
bration by authorized
ation, red exbaust flame
penonDel.
at niBhe. EXlRme cues
indicated by b1&ck smoke
from exhaust.
Mixture tOO Ian; indicated
Check fuel
suppl~·.
Check
by
overhcatiq or back· fuel lines for obstrUCtions
firing.
or restrictions.
leaky
noule. Remove nozzle and blow intO
it. Air escapin, throlllh
the noule valve indicates
leaking. Replace nozde.
Cloged injeCtor nozzles.
Remove and tlush with acetone.
Slow through orifice with
compressed air • 100 PSI.
Dirt in inlet screen. Remove screen and :lllsh With
acetone. Blow with
compressed air.
Din in "T" fitting.
Remove "T" fitting
lot
dism-
burer. clean in acetone.
Blow through orifice With
compressed air - 100 pSI.
Fuel supply pressure C~eck
ruel pump pressure.
excessively high.
Leak in mlilufoid line. Tighten fittings.
POWER PlANT
ISSUED: 8/18nZ
2
E14
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