Kohler Command PRO EFI PCV680 Service Manual page 41

Troubleshooting Guide
Condition
Faulty spark plugs.
Lock-off not functioning.
Fuel pressure low.
Insuffi cient fuel delivery.
Engine Starts Hard
or Fails to Start TPS set incorrect (ECU Reset and TPS Initialization).
When Hot.
Crankshaft position sensor loose or faulty.
TPS faulty.
Engine temp sensor faulty.
Faulty injectors.
Faulty spark plugs.
Insuffi cient fuel delivery.
Engine Stalls or
TPS set incorrect.
Idles Roughly
TPS faulty.
(cold or warm).
Faulty engine temperature sensor.
Faulty injectors.
Fuel injector(s), fuel fi lter, or fuel line.
Dirty air cleaner.
Insuffi cient fuel pressure or fuel delivery.
Engine Misses,
Hesitates, or Stalls
Vacuum (intake air) leak.
Under Load.
Improper governor setting, adjustment or operation.
TPS faulty, mounting problem or TPS Initialization Procedure incorrect.
Bad coil(s), spark plug(s), or wires.
Faulty/malfunctioning ignition system.
Dirty air fi lter.
Insuffi cient fuel delivery or pressure.
Improper governor adjustment.
Low Power Plugged/restricted exhaust.
One injector not working.
Basic engine problem exists.
TPS faulty or mounting exists.
Throttle plate in throttle body not fully opening to WOT stop (if equipped).
24 690 31 Rev. D
Possible Cause
KohlerEngines.com
Propane EFI System
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