Section 14 - Engine Testing - Group 14 Chassis Dynamometer (14-03) M11 Page 14-41 Fuel Rate Use fuel measuring device, Part No. 3376375, to measure the rate of fuel consumption. For more information, refer to ‘‘Engine Testing - General Information’’. Install the fuel measuring device as follows: The fuel return hose from the engine to the fuel measuring device (A). The fuel inlet hose to the fuel filter inlet (B). The return hose from the device (C) to the fuel tank. The fuel inlet hose to the device from the fuel tank suction line (D). NOTE: Adjust the fuel rate to compensate for temperature variation if required.
Fuel Inlet Temperature °C °F 15.5 MIN 60 48.9 MAX 120 Fuel Inlet Restriction Measure the fuel inlet restriction. Install a vacuum gauge, Part No. ST-434, between the fuel pump inlet and the gear pump inlet. NOTE: Do not measure fuel inlet restriction with the fuel measuring device installed. This will not measure the inlet restriction of the vehicle’s supply plumbing. Hold the gauge at the same level as the gear pump. NOTE: The gauge will not measure the correct vacuum if the gauge is not held at the same level as the gear pump.