PPI-109-REV. B IMPCO Technologies Inc. April, 2008
•
If the differential pressure between two chambers or compartments is required, such as a turbo
application, make the connections as illustrated. Verify that the expected pressure differential
does not exceed the limits of the gauges before connecting.
C. Primary Pressure Test Adapters (F4-4 & F4-8):
P/N F4-4 is a straight adapter for connections where there are no obstructions in front of the
regulator primary test port. P/N F4-8 is a 90
O
adapter for connections where some obstruction may
hinder the use of the straight adapter. To connect either adapter to the primary test port of a
regulator:
1. Shut off the fuel tank manual shut-off valve.
2. Start the engine and let it run until it dies from lack of fuel.
3. Turn off the ignition key.
4. Remove the Primary Test Port Plug from the regulator.
Cobra Regulator, showing the primary pressure test port. Other regulators have a similar port.
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