Effectivity 71-00-02
PA-28RT-201T Page 71-03
December 1, 1978
3B16
CHART 7101. TROUBLESHOOTING CHART (ENGINE) (cont.)
Engine runs rough at speeds Improper fuel-air mixture. Check manifold connections
above idle. 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.
Restricted fuel nozzle. Remove and clean all noz-
zles.
Ignition system and spark Clean and re-gap spark
plugs defective. plugs. Check ignition cables
for defects. Replace defec-
tive components.
Engine lacks power, reduc- Incorrectly adjusted throttle Check movement of linkage
tion in maximum manifold control, “sticky” linkage or by moving control from idle
pressure or critical altitude. dirty air cleaner. to full throttle. Make proper
adjustments and replace
worn components. Service
air cleaner.
Improperly adjusted waste Check exhaust bypass screw
gate valve. adjustment.
Defective ignition system. 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.
Loose or damaged exhaust Inspect entire exhaust system
system. to turbocharger for cracks
and leaking connections.
Tighten connections and re-
lace damaged parts.
Trouble Cause Remedy
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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