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Fuel Rail With Fuel Pressure Test Port
- Release fuel pressure. See FUEL PRESSURE RELEASE. Remove test port cap. Install a 0-60 psi (0-4.2 kg/cm2
) fuel pressure gauge at test port.
- Start engine and allow to idle. Fuel pressure should be 44.2-54.2 psi (3.1-3.7 kg/cm2
). If no fuel pressure exists, fuel pump relay control circuit may be defective. See TEST TC-101A, in TESTS W/CODES
article.
- If fuel pressure exceeds specification, fuel pump is okay, but fuel pressure regulator is defective. Release fuel pressure and replace fuel pump module. See REMOVE/INSTALL/OVERHAUL
article.
- If fuel pressure is okay, release fuel pressure. Remove test gauge hose. Install test port cap.