Test NS-4A - Correcting Fuel Delivery

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE procedure.

Record fuel pressure gauge reading. Turn ignition off. Release fuel pressure. Remove fuel pressure gauge. Install fuel pressure gauge between fuel tank and fuel filter. Turn ignition on.
Using scan tool, actuate Auto Shutdown (ASD) fuel system. Record fuel pressure gauge reading. Compare fuel pressure gauge reading with previous reading. If fuel pressure gauge reading is not at least 10 psi more than previous reading, go to step 4). If fuel pressure gauge reading is at least 10 psi more than previous reading, go to next step.
Turn ignition off. Inspect fuel lines between fuel filter and fuel rail or throttle body for restriction. Repair as required. Perform TEST VER-1. If no restrictions are observed, replace fuel filter. Perform TEST VER-1.
CAUTION: DO NOT allow fuel pressure to exceed 70 psi (4.9 kg/cm² ) when squeezing fuel return hose.
Gently squeeze fuel return hose. Read fuel pressure gauge reading. Using scan tool, stop fuel system actuator test. See FUEL PRESSURE SPECIFICATIONS table. If fuel pressure is more than minimum specification, replace fuel pressure regulator. Perform TEST VER-1. If fuel pressure is less than minimum specification, replace fuel pump and sock filter. Perform TEST VER-1.

FUEL PRESSURE SPECIFICATIONS

Application	psi (kg/cm² )
Caravan & Voyager	24.-44. (2.4-3.1)