Caution! When disconnecting the fuel supply rail, be careful, as there is fuel in the rail and fitting. Take measures to protect vulnerable parts.
Disconnect quick release coupling 1.
Attach a tube of sufficient length to outlet pipe A so that when the pump is turned on, the fuel drains into the control measuring cup.
Turn on the pump by shunting contacts 3 and 5 of the fuel pump relay (Relay A for K4M and F4R engines Relay B for L7X engine).
Measure the pump performance.
Measured productivity: 80-120 l/h.
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