Fuel Pressure Regulator Check

WARNING: This page is about a different car, the 2004 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.

Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold.

Fig 1: Plug Intake Manifold

Courtesy of NISSAN MOTOR CO., U.S.A.

Plug intake manifold with a blind cap.
Connect variable vacuum source to fuel pressure regulator.
Start engine and read indication of fuel pressure gauge as vacuum is changed.
1. Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.

Fig 2: Reading Indication Of Fuel Pressure Gauge

Courtesy of NISSAN MOTOR CO., U.S.A.