Engine Manual

44 TP-7095 4/18
Problem
Possible Cause
Solution
Knocks or Pings
Incorrect fuel
Make sure fuel system is configured
properly for LPG or NG supply.
Engine overloaded
Disconnect or reduce loads.
Faulty spark plug or wire
Inspect, adjust, or replace as needed.
Dirty/restricted fuel system
Check fuel system and clean components
as needed.
Dirty air filter
Inspect and replace as needed.
Boost pressure too high (if applicable)
Check for stuck wastegate, check for leak
in wastegate boost line (if applicable).
Excessive intake manifold temperature
Check charge air cooler for debris and
clean as needed (if applicable).
Skips or Misfires
Incorrect fuel
Make sure fuel system is configured
properly for LPG or NG supply.
Faulty spark plug or wire
Inspect, adjust, or replace as needed.
Dirty/restricted fuel system
Check fuel system and clean components
as needed.
Dirty air filter
Inspect and replace as needed.
Backfires
Incorrect fuel
Make sure fuel system is configured
properly for LPG or NG supply.
Faulty spark plug or wire
Inspect, adjust, or replace as needed.
Dirty/restricted fuel system
Check fuel system and clean components
as needed.
Dirty air filter
Inspect and replace as needed.
Overheats
Incorrect fuel
Make sure fuel system is configured
properly for LPG or NG supply.
Dirty/restricted fuel system
Check fuel system and clean components
as needed.
Incorrect oil level
Check engine oil level; add as needed.
Engine overloaded
Disconnect or reduce loads.
Faulty spark plug or wire
Inspect, adjust, or replace as needed.
Faulty engine coolant temperature sender
Inspect the engine coolant temperature
sender and wires and replace or repair as
needed.
Consumes Excess Fuel
Faulty spark plug or wire
Inspect, adjust, or replace as needed.
Dirty/restricted air cleaner element
Clean or replace.
Incorrect fuel pressure
Check and adjust fuel pressure.
ECM Does Not Store DTC
Faulty electrical connections, components,
or wiring
Contact an authorized Kohler
distributor/dealer.
Erratic operation
Air induction system leak
Inspect air induction system.