Operation Section
-96-
Problem
Probable Cause
Corrective Action
Incorrect Idle speed control
Incorrect timing or spark control
See Advanced Diagnostics & See
G424E/G430E Engine Service Manual
Rough Idle
Engine Mechanical
See Engine Service Manual
Incorrect Idle speed control
Throttle sticking
See Advanced Diagnostics & See
G424E/G430E Engine Service Manual
High Idle Speed
Foot pedal sticking or incorrect
pedal signal
Check pedal return spring travel for binding
z
See Advanced Diagnostics
Clogged fuel filter
Repair/replace as required
z
See Maintenance section, 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
Air filter clogged
Check air filter
z
Clean/replace as required
Faulty vapor connection between
the pressure regulator/converter
and the mixer
Check connection
z
Verify no holes in hose
z
Clamps must be tight
z
Look for kinked, pinched and/or
collapsed hose
Pressure regulator malfunction
Test pressure regulator operation
z
See G424E/G430E Engine Service
Manual
Air/Fuel Mixer malfunction
Check mixer
z
See G424E/G430E Engine Service
Manual
Restricted exhaust system
Check exhaust system
z
Measure exhaust back pressure
Incorrect ignition control
Incorrect air/fuel control
Poor High Speed
Performance
Incorrect throttle position
See Advanced Diagnostics & See
G424E/G430E Engine Service Manual
