Kohler Command PRO ECV630 Service Manual page 38

EFI SYSTEM-ECV
Troubleshooting Guide
Condition
Faulty spark plugs.
Fuel pump not running.
Fuel pressure low.
Insufficient 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.
Insufficient 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 filter, fuel line, or fuel pick-up dirty/restricted.
Dirty air cleaner.
Engine Misses, Insufficient fuel pressure or fuel delivery.
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 filter.
Insufficient 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).
38
Possible Cause
KohlerEngines.com 24 690 02 Rev. D