Section 14 - Engine Testing - Group 14 Engine Dynamometer - Install Engine (14-01) M11 Page 14-27 Fuel Inlet Restriction Measure the fuel inlet restriction. Install a vacuum gauge, Part No. ST-434, between the fuel fitter 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.
Fuel Inlet Restriction (plus ECM Cooling Plate) mm Hg in Hg Clean Filter 152 MAX 6 Dirty Filter 254 MAX 10 Engine Speed (RPM) With a Verified Tachom- eter Use digital optical tachometer, Part No. 3377462, to check and verify engine speed. Fuel Pressure Measure the fuel pressure. Install the pressure gauge, Part No. ST-435-6, or the pressure gauge in the fuel measuring device, Part No. 3376375, to the Compucheck W fitting on the fuel shutoff valve. NOTE: Pressure gauge, Part No. ST-435-6, is included with snap rail pressure gauge, Part No. 3375932. Fuel Pressure at Governed RPM kPa psi 1034 MIN 150 1241 MAX 180