Fuel Line Pressure Test

Disconnect banjo coupling at inlet to fuel injection manifold. Connect a fuel pressure gauge using existing seals. Ensure pressure gauge hangs vertically.
Turn ignition off. Remove fuse No. 30 on 900 models. Remove fuse No. 14 from 9000 Turbo. Connect a jumper lead between fuse No. 27, 28, or 29 and slot of fuse No. 30 for 900 models. Connect the jumper between fuse No. 22 and slot of fuse No. 14 on 9000 Turbo. This will provide current to the fuel pump. Turn ignition on.
Line pressure should rise to about 36.3 psi (2.57 kg/cm² ). If line pressure is too high, go to step 4). If line pressure is too low, got to step 5).
Turn ignition off. Disconnect fuel return line from pressure regulator and blow in line. If line is open, pressure regulator is defective and should be replaced. If line is blocked, unblock, or replace with a new return line. Check one-way valve at tank, and retest system.
Check fuel level, do not rely on fuel gauge. Check for fuel system leaks. Check fuel pressure regulator. See FUEL PRESSURE REGULATOR test.

NOTE: If proceeding to FUEL PRESSURE REGULATOR TEST, do not remove fuel pressure gauge.