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.
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 CompucheckT
fitting on the fuel shutoff valve.
NOTE: Pressure gauge, Part No. ST-435-6, is included with
snap rail pressure gauge, Part No. 3375932.
Engine Dynamometer - Install Engine (8-01) Engine Testing
N14Page 8-14
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