Operation CHARM: Car repair manuals for everyone.

Fuel Pressure







Test conditions
Battery voltage 12.5 V
Function and voltage supply for the Fuel Pump is OK.
Fuel tank at least 1/4 filled.
Ignition switched off.

Fuel Pressure Fuel Pressure Test

Fuel Pump Delivery Quantity
Compare quantity of fuel delivered with minimum delivery rate in diagram (cm3/15s)





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