Maintenance
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3.4.7. Natural gas pressure (NGP) sensor
<Removal>
1) Close all fuel cylinder manual valves. On cylinders with electronic in tank valves, disconnect the
electrical harness connectors from the tank valves.
CAUTION:
Always close the fuel cylinder valves before servicing the system. Close the valves using the
valve manufactures recommended procedure. Check for multiple cylinders and close all the
valves before proceeding. Do not close the manual shut off (1/4 turn) valve.
2) Relieve fuel pressure by running the engine until it stops.
3) Close the manual shut off (1/4 turn) valve.
4) Disconnect the battery ground cable.
5) Clean the dirt and foreign material from the fuel metering valve.
6) Depress the core of the valve to relieve the pressure in the metering valve.
7) Disconnect the electrical connector from the NGP sensor.
8) Remove the NGP sensor.
<Installation>
1) Lubricate the O-ring with white lithium grease or a commercial O-ring lubricant.
2) Install the NGP sensor.
3) Connect the electrical connector to the NGP sensor.
4) Connect the battery ground cable.
5) Open the fuel manual shut off (1/4 turn) valve.
6) Open the fuel cylinder manual valves. On cylinders with electronic in tank valves, connect the
electrical harness connectors to the tank valves.
7) With the engine operating at an idle, check for leaks around the NGP sensor using a non ammonia
soap solution or a liquid commercial leak detector.
8) Run the vehicle and check for proper operation.
3.4.8. Natural gas temperature (NGT) sensor replacement
<Removal>
1) Close all fuel cylinder manual valves. On cylinders with electronic in tank valves, disconnect the
electrical harness connectors from the tank valves.
Torque 10 - 12N
•
m
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