Fuel System Pressure
- Ensure engine is at normal operating temperature. Using Adapter (VW 1318/4), connect Fuel Pressure Tester (VW 1318) to fuel distributor. See Fig 1
. Close fuel pressure valve.
Courtesy of AUDI OF AMERICA, INC.
- Remove fuel pump relay from fuse panel and connect Remote Control (US4480/3) in fuse panel fuel pump relay cavity. Ensure fuse No. 13 on fuse panel is good.
- Open valve on pressure tester and energize fuel pump with remote control. Fuel pressure should be 89-94 psi. (6.3-6.6 kg/cm2
). If fuel pressure is too high, carefully remove fuel return line from fuel pressure regulator and place in container.
- Repeat test. If fuel pressure is still too high, replace fuel pressure regulator. If pressure is okay, check return line for obstruction or kinks and repair or replace as necessary.