Piper Arrow IV Turbo Maintenance Manual page 572

Trouble
Engine runs rough at speeds
above idle.
Engine lacks power, reduc-
tion in maximum manifold
pressure or critical altitude.
Effectivity
PA-28RT-201T
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
CHART 7101. TROUBLESHOOTING CHART (ENGINE) (cont.)
Improper fuel-air mixture.
Restricted fuel nozzle.
Ignition system and spark
plugs defective.
Incorrectly adjusted throttle
control, "sticky" linkage or
dirty air cleaner.
Improperly adjusted waste
gate valve.
Defective ignition system.
Loose or damaged exhaust
system.
Cause
3B16
Remedy
Check manifold connections
for leaks. Tighten loose con
nections. Check fuel control
for setting and adjustment.
Check fuel filters and screens
for dirt. Check for proper
pump pressure and readjust
as necessary.
Remove and clean all noz-
zles.
Clean and re-gap spark
plugs. Check ignition cables
for defects. Replace defec-
tive components.
Check movement of linkage
by moving control from idle
to full throttle. Make proper
adjustments and replace
worn components. Service
air cleaner.
Check exhaust bypass screw
adjustment.
Inspect spark plugs for foul
ed electrodes, heavy carbon
deposits, erosion of elec-
trodes, improperly adjusted
electrode gaps and cracked
porcelains. Test plugs for re-
gular firing under pressure.
Replace damaged or misfir-
ing plugs. Spark plug gap to
be 0.015 to 0.019 inches.
Inspect entire exhaust system
to turbocharger for cracks
and leaking connections.
Tighten connections and re-
lace damaged parts.
71-00-02
Page 71-03
December 1, 1978