Warm Engine Control Pressure Test
NOTE:
Connect pressure testing gauge and valve in same manner as for Cold Engine Control. Pressure Test. Keep pump relay bridged.
- Be sure to connect control pressure regulator electrical plug, previously removed. OPEN valve. See Figure.
- Start engine and idle until fuel pressure stabilizes. Reading should be 48-54 psi (3.4-3.8 kg/cm2
).NOTE: On Audi 5000, pressure should be 49-53 psi (3.5-3.8 kg/cm2 ) with control pressure regulator vacuum hose connected; 39-43 psi (2.8-3.1 kg/cm2 ) with hose disconnected.
- If control pressure does not increase enough, remove plug from control pressure regulator and connect a test lamp across terminals. If lamp does not light, either power or ground connection is bad. If lamp lights with engine idling and pressure is too low, replace regulator.