Make sure that the clamp screws do not touch surrounding parts.
1. Relieve fuel pressure to zero.
2. Connect the pressure gauge between the fuel filter and the fuel rail.
3. Start the engine and check for fuel leaks.
4. Read the pressure gauge readings at idle. Pressure for GA engines, kPa (kgf/cm²):
- Vacuum hose connected approx. - 245 (2.5)
- Vacuum hose disconnected - about 294 (3.0)
Pressure for SR engine, kPa (kgf/cm²):
- Vacuum hose connected at approx. - 235 (2.4)
- Vacuum hose disconnected - about 294 (3.0)
If the pressure differs significantly from the specified value, check the pressure regulator as follows:
- a) Stop the engine and disconnect the vacuum hose of the pressure regulator from the intake manifold. Close the manifold opening with a rubber plug.
- b) Attach a hand vacuum pump to the pressure regulator and check if the fuel pressure decreases as the vacuum increases. If not, replace the pressure regulator.