Maintenance Section
-136-
Horn & Lights (If Equipped) – Check
1. Press horn button, to determine if horn is
operational.
2. Check and replace all defective gauges.
3. Check all lights such as warning, directional, backup,
driving and flood lights for correct operation.
Replace all burned out bulbs. Have repairs made if
needed.
Inspect Vacuum Lines and Fittings
(LP Engine only)
1. Visually inspect vacuum lines and fittings for
physical damage such as brittleness, cracks and
kinks. Repair/replace as required.
2. Solvent or oil damage may cause vacuum lines to
become soft resulting in a collapsed line while the
engine is running.
3. If abnormally soft lines are detected, replace as
necessary.
(1) LP fuel lock-off, (2) LP regulator/converter,
(3) Fuel Trim Valve,
(4) LP mixer, (5) Vacuum lines,
(6) Coolant lines, (7) LP fuel line
Fuel Trim Valve(FTV) Inspection
(G643E Engine only)
1. Visually inspect the Fuel trim valve(3) for abrasions
or cracking. Replace as necessary.
2. To ensure the valve is not leaking a blow-by test
can be performed.
3. With the engine off, disconnect the electrical
connector to the FTV.
4. Disconnect the vacuum line from the FTV to the
pressure regulator/converter, at the converter’s tee
connection.
5. Lightly blow through the vacuum line connected to
the FTV. Air should not pass through the FTV when
de-energized. If air leaks past the FTV when de-
energized, replace the FTV.
Inspect Electrical System (LP Engine
only)
1. Check for loose, dirty or damaged connectors and
wires on the harness including: Fuel lock-off, TMAP
sensor, O2 sensor, Electronic throttle, Control
Relays, Fuel Trim Valve, Foot Pedal, and Distributor
sensor.
2. Repair and/or replace as necessary.
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