Kohler Command Pro ECV850 Service Manual page 39

EFI SYSTEM
Troubleshooting Guide
Condition Possible Cause
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, fuel line, or fuel pick-up dirty/restricted.
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.
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).
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