Operation CHARM: Car repair manuals for everyone.

Fuel Pressure











Fuel Pressure
At idle specified value Approximately 4.0 to 7.0 bar
Turn ignition off. After 10 minutes there must be a residual pressure of at least 3.0 bar.

Fuel Pump Delivery Quantity
Compare quantity of fuel delivered with minimum delivery rate in the diagram (cm3/30 sec.)





Voltage at the fuel pump with engine stopped and fuel pump running is approx. 2 volts less than battery voltage