System Pressure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1987 Volkswagen Scirocco, 1987 Volkswagen Quantum, 1987 Volkswagen Jetta, 1987 Volkswagen Golf, and 1987 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
- Check and note existing pressure. Remove pressure regulating valve from fuel distributor. See Fig 1.
- Adjust pressure by changing shims in shim stack. Add shims to raise system pressure. Remove shims to lower system pressure.
- A shim change of .020" (.5 mm) will change system pressure approximately 4.2 psi. (.3 kg/cm2 ). Ensure any replacement shims are identical in diameter to existing shims.