Fuel Pump Delivery Rate

CHECKING THE DELIVERY RATE OF THE FUEL PUMP

Precondition: Fuel filter and power supply in perfect condition.

1. Remove the hot-air blower on the left-hand side to the rear of the engine compartment.
2. Undo the fuel return line from the distributor while bracing. Catch escaping fuel.
3. Hold a test hose comprising a 1.5 m (5 ft) low-pressure hose and a 90° angled 10 mm hose stem with M 16 x 1.5 thread in a measuring receptacle.
4. Disconnect the DEE relay from the central electric system and bridge terminals 30 and 87 b with a piece of cable.
Allow fuel to run into the measuring receptacle for 30 seconds. The delivered quantity must be at least:

850 cc/30 sec (.9 Qts/30 sec).