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
