Fox & JETTA GLI With Cis-E & Cis-MOTRONIC
- Connect pressure gauge (VW 1318) between fuel distributor port and the end of the fuel line to cold start valve. Ensure control lever is in the closed position. See Fig 1
. Bleed excess air from system by cycling control valve with gauge upside down.
- Open fuel pressure gauge control lever. Start engine allow to run. System fuel pressure should 75-82 psi (5.2-5.6 kg/cm2
). On Jetta GLi system pressure should be 89-95 psi (6.1-6.6 kg/cm2
). If system fuel pressure is low, perform fuel volume check. If fuel volume is okay, replace fuel pressure regulator.
- If fuel pressure is above specification, remove return hose from pressure regulator and repeat test. If system pressure is okay, check for restricted fuel return line. If pressure is incorrect, replace fuel pressure regulator.
Courtesy of VOLKSWAGEN UNITED STATES, INC.