Piper Arrow IV Turbo Maintenance Manual page 583

Trouble
Failure of engine to idle
properly.
Lower power and uneven
running.
Effectivity
PA-28RT-201
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
CHART 7102. ENGINE TROUBLESHOOTING
Cause
Incorrect idle mixture.
Leak in the induction system.
Incorrect idle adjustment.
Uneven cylinder compres-
sion.
Faulty ignition system.
Insufficient fuel pressure.
Mixture too rich; indicated
by sluggish engine opera-
tion, red exhaust flame at
night. Extreme cases indica-
ted by black smoke from
exhaust.
Mixture too lean; indicated
by overheating or backfiring.
Leaks in induction system.
Defective spark plugs.
Improper fuel.
Magneto breaker points not
working properly.
3C3
Remedy
Adjust mixture.
Tighten all connections in
the induction system. Re-
place any parts that are de-
fective.
Adjust throttle stop to
obtain correct idle.
Check condition of piston
rings and valve seats.
Check entire ignition system.
Adjust fuel pressure.
Readjustment of fuel in
jector by authorized person-
nel is indicated.
Check fuel lines for dirt or
other restrictions. Check
fuel injection nozzles.
Tighten all connections.
Replace defective parts.
Clean and gap or replace
spark plugs.
Fill tank with fuel of recom-
mended grade.
Clean points. Check internal
timing of magnetos.
71-00-02
Page 71-14
December 1, 1978