Fuel Pressure Test
WARNING: This page is about a different car, the 1997 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For additional information on fuel pressure and fuel pump testing procedures, see appropriate NO TROUBLE CODE (NTC) TEST and NO START (NS) TEST in TESTS W/CODES - 2.5L
article.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See the COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery.
NOTE:
Vehicle uses fuel pressure test port, located on fuel rail near throttle body.
- Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Install fuel pressure gauge with hose on fuel pressure test port.
- Start engine and allow to idle. Fuel pressure should be 44-54 psi (303-373 kPa). If no fuel pressure exists and engine will not start, fuel pump relay and control circuit may be defective. See FUEL PUMP RELAY under FUEL SYSTEM.
- If fuel pressure exceeds specification, fuel pump is okay, but fuel pressure regulator is defective. Replace fuel pressure regulator. Fuel pressure regulator is incorporated with the fuel filter. Fuel filter/fuel pressure regulator is located on top of fuel tank, at fuel pump module. See REMOVE/INSTALL/OVERHAUL - 2.5L article.