G420E/G424E Tier LP Engine Basic Troubleshooting 39
Problem Probable Cause Corrective Action
Fuel container almost empty LPG Vapor from liquid outlet
z Fill fuel container
z Do not exceed 80% of liquid capacity
Excess flow valve closed Reset excess flow valve
z Close liquid valve
z Wait for a “click” sound
Slowly open liquid valve
Clogged fuel filter Repair/replace as required
z See Chapter 3 Fuel Filter replacement
Plugged fuel line Remove obstruction from the fuel line
z Close liquid fuel valve
z Using caution, disconnect the fuel line
(some propane may escape)
z Clear obstruction with compressed air
z Re-connect fuel line
z Slowly open liquid fuel valve & Leak test
Pressure regulator freezes Check level in cooling system
z Must be full, check coolant strength
z -35F minimum
z Check coolant hoses
z Watch for kinks and/or pinched hoses
z Verify one pressure hose and one return
hose
Fuel Lock-off malfunction Repair/replace Fuel Lock-off
z See Chapter 3 Fuel Lock-off
Incorrect idle speed or ignition
problem
See Chapter 5 Advanced Diagnostics
Will Not Run
Continuously
Engine Mechanical See Engine Manufacturers Service Manual
Fuel container almost empty LPG Vapor from liquid outlet
z Fill fuel container
z Do not exceed 80% of liquid capacity
Will Not
Accelerate/Hesita
tion During
Acceleration
Excess flow valve closed Reset excess flow valve
z Close liquid valve
z Wait for a “click” sound
Slowly open liquid valve
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