Daewoo Forkilt Operation & Maintenance Manual page 93

Basic Troubleshooting(LPG)
The MI-04 systems are equipped with built-in fault
diagnostics. Detected system faults can be
displayed by the Malfunction Indicator Lamp (MIL)
and are covered in the Advanced Diagnostics
section. Items such as fuel level, plugged fuel
lines, clogged fuel filters and malfunctioning
pressure regulators may not set a fault code by the
Small Engine Control Module (SECM). Below are
Problem
Engine Cranking
but Will Not Start
Probable Cause
Fuel container empty
Liquid valve closed
Excess flow valve closed
Plugged fuel line
Broken Fuse - SECM
Clogged fuel filter
Faulty vapor connection between
the pressure regulator/converter
and the mixer
Fuel Lock-off malfunction
Pressure regulator/converter
malfunction
Incorrect air/fuel or ignition/spark
control
No VR Sensor Signal
basic checks that should be made before referring
to the Advanced Diagnostics section, if engine or
drivability problems are encountered.
Locating a problem in a propane engine is done
exactly the same way as with a gasoline engine.
Consider all parts of the ignition and mechanical
systems as well as the fuel system.
Fill fuel container
Do not exceed 80% of liquid
capacity
Slowly open liquid valve
Reset excess flow valve
Close liquid valve
Wait for a "click" sound
Slowly open liquid valve
Remove obstruction from the fuel line
Close liquid fuel valve
Using caution, disconnect the fuel
line (some propane may escape)
Clear obstruction with compressed
air
Re-connect fuel line
Slowly open liquid fuel valve
Leak test
Replace Fuse for SECM
See Maintenance Section, Fuses
replacement
Repair/replace as required
See Maintenance Section, LP Fuel
Filter replacement
Check connection
Verify no holes in hose
Clamps must be tight
Look for kinked, pinched and/or
collapsed hose
Repair/replace Fuel Lock-off
See G424E/G430E Engine Service
Manual
Test pressure regulator/converter operation
See G424E/G430E Engine Service
Manual
See Advanced Diagnostics
Verify the VR signal is present
See Advanced Diagnostics
-91-
Operation Section
Corrective Action