
-95-
-95-
Operation Section
Operation Section
Problem
Problem
Probable
Probable Cause
Cause
Corrective
Corrective Action
Action
Throttle butterfly valve not opening
Throttle butterfly valve not opening
or sticking
or sticking
Foot Pedal signal incorrect or
Foot Pedal signal incorrect or
intermittent
intermittent
Incorrect air/fuel or ignition
Incorrect air/fuel or ignition control
control
See Advanced Diagnostics
See Advanced Diagnostics
Will Not
Will Not
Accelerate/Hesita
Accelerate/Hesita
tion During
tion During
Acceleration or
Acceleration or
Engine Stalls
Engine Stalls
(Gas)
(Gas)
Engine
Engine Mechanical
Mechanical
See
See Engine
Engine Service
Service Manual
Manual
Isolate the gasoline system by
Isolate the gasoline system by
running the lift truck on LPG
running the lift truck on LPG
Verify LPG cylinder is full and valve is open.
Verify LPG cylinder is full and valve is open.
If the problem does not exist in LPG mode
If the problem does not exist in LPG mode
proceed with the corrective action steps
proceed with the corrective action steps
below.
below.
If the problem
If the problem also exists in LPG mode then
also exists in LPG mode then
the root cause is most likely to be
the root cause is most likely to be
something other than the fuel system
something other than the fuel system
See Advanced Diagnostics & Service
See Advanced Diagnostics & Service
Manual
Manual
Pressure
Pressure regulator
regulator malfunction
malfunction
Test
Test pressure
pressure regulator
regulator operation
operation
See Engine Service Manual
See Engine Service Manual
Clogged
Clogged fuel
fuel filter
filter
Repair/replace
Repair/replace as
as required
required
See Maintenance section, Primary and
See Maintenance section, Primary and
Secondary Fuel Filter re
Secondary Fuel Filter replacement
placement
Pressure
Pressure regulator
regulator malfunction
malfunction
Test
Test pressure
pressure regulator
regulator operation
operation
See Engine Service Manual
See Engine Service Manual
Fuel
Fuel Injector
Injector malfunction
malfunction
Test
Test Injector
Injector operation
operation
See Engine Service Manual
See Engine Service Manual
Rough Idle (Gas)
Rough Idle (Gas)
Vacuum
Vacuum leak
leak
Check
Check for
for vacuum
vacuum leaks
leaks
Between mixer and throttle body
Between mixer and throttle body
Between throttle body and intake
Between throttle body and intake
manifold
manifold
Between intake manifold and cylinder
Between intake manifold and cylinder
head
head
Summary of Contents for G20E-5
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