All Other Models
- Release fuel system pressure. Remove fuel supply line at cold start injector and connect fuel pressure gauge. Disconnect vacuum hose from pressure regulator and connect hand vacuum pump to regulator. Start engine and check pressure reading in Fuel Pressure Specifications chart.
- Apply 16 in. Hg to pressure regulator. Reading should drop to approximately 29 psi (2.0 kg/cm2
). If pressure is too low, check fuel pump delivery rate. If pressure is too high, check fuel return line. If readings are still not as specified, replace regulator.FUEL PRESSURE SPECIFICATIONS
Application Pressure psi (kg/cm2 ) Fiat X1/9 33-39 (2.3-2.7) Spider & Spider Turbo 39-45 (2.7-3.2) All Others 33-39 (2.3-2.7)