Sequence of work
1. Remove the end of the fuel return line and lower it into a measuring container.
2. Distribution injection pump: start the engine. In idle mode, 0.25 liters should be supplied in 15 seconds.
3. Inline injection pump: Remove the ignition key to prevent the engine from starting.
4. Turn the starter with the auxiliary wire for 30 seconds.
5. With a good battery, the amount of fuel supplied should be at least 0.15 liters.
6. If the measured amount of fuel is insufficient, replace the fuel pump.