F - Fuel Pressure Test

WARNING: Before starting these tests, release the fuel pressure from the fuel system to reduce the risk of injury or fire, as outlined in Service Precautions.

Fuel Pressure Test Setup:

^ After releasing the fuel pressure, install Rotunda Fuel Pressure Tester 014-00748 or equivalent with EFI Test Adapter D870-9974-A in the fuel line between the fuel rails, with its main valve open and its drain valve closed.

Fuel Pump Test Connector:

^ Jump the fuel pump test terminal to ground.

^ Key On.

^ Is the fuel pressure within specification?

YES -- Go to FD1. FD1 - Check Fuel Injection Function

NO -- (If zero) -- Go to FA1. FA1 - Check Fuel Pump Motor

(If low) -- Go to FB1. FB1 - Power Supply to Fuel Pump

(If high) -- Go to FC1. FC1 - Check Fuel Pressure Regulator For High Pressure