User Manual

38
KohlerEngines.com 24 690 01 Rev. D
Troubleshooting Guide
Condition Possible Cause
Engine Starts Hard
or Fails to Start
When Hot.
Faulty spark plugs.
Fuel pump not running.
Fuel pressure low.
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TPS set incorrect (ECU Reset and TPS Initialization).
Crankshaft position sensor loose or faulty.
TPS faulty.
Engine temp sensor faulty.
Faulty injectors.
Engine Stalls or
Idles Roughly
(cold or warm).
Faulty spark plugs.
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TPS set incorrect.
TPS faulty.
Faulty engine temperature sensor.
Faulty injectors.
Engine Misses,
Hesitates, or Stalls
Under Load.
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Dirty air cleaner.
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Vacuum (intake air) leak.
Improper governor setting, adjustment or operation.
TPS faulty, mounting problem or TPS Initialization Procedure incorrect.
Bad coil(s), spark plug(s), or wires.
Low Power
Faulty/malfunctioning ignition system.
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Improper governor adjustment.
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).
DELPHI EFI