Electronic Control System Gas Plus Engines – 019-101   Gas Mass Flow Sensor

CAUTION  To reduce the possibility of damaging the harness connector, do not pry or pull on the harness connector lock. Push on the lock to release it.

WARNING  Natural gas is highly flammable. Keep all cigarettes, sparks, arcing switches and equipment, pilot lights, flames and other sources of ignition out of the work area and areas sharing ventilation. Provide ample fresh air ventilation.

WARNING  If natural gas leaks are present, do not store the vehicle inside or in any area that is covered. Severe personal injury can result from asphyxiation or explosion.

Start the engine and allow it to run at idle.

Shut off the fuel supply at the tanks.

Allow the engine to run until it shuts down.

NOTE: When disconnecting the sensor, check to see that the seal for the sensor pins remains on the sensor and has not lodged in the harness connector. If it has come off with the connector, remove it and install it back to the sensor. The harness connector does not have a seal in it. Failure to correct this can cause the gas mass flow sensor to malfunction.

Disconnect the harness from the gas mass flow sensor.

Disconnect the fuel inlet line from the fuel pressure regulator. Let any residual gas vent.

Remove the two capscrews and the sensor.

Install the new gas mass flow sensor and gasket, and the two capscrews.

Connect the inlet fuel line.

Connect the engine harness connector to the sensor.

Turn on the gas at the tanks.