| On vehicles with four-wheel drive the fuel tank is divided into a left and a right chamber. A so-called suction-jet pump -1- is used for delivering the fuel from the left fuel tank chamber -3- to the baffle housing of the fuel delivery unit -2- on the right. |
| Suction-jet pump: operation |
| The suction-jet pump operates according to the principle of fluid entrainment: the stream of fuel from the electric fuel pump is passed through a nozzle in the suction-jet pump, and is thus accelerated. The accelerated stream of fuel draws off the surrounding fuel and delivers it to the baffle housing of the fuel delivery unit. |
| Faults caused by defective suction-jet pump |
Note | If the suction-jet pump is defective, the engine can stop due to fuel starvation when the tank is still 1/4 full. |
| If the suction-jet pump is not working, up to 15 litres of fuel (up to about 1/4 of tank capacity) may remain in the left chamber of the tank, where it cannot be drawn into the fuel delivery unit. |
| If the engine stops due to fuel starvation with the tank up to about 1/4 full, proceed as follows: |
| If fuel pump is OK, but no fuel is delivered: |
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| Put another 5 litres (approx.) of fuel into tank. |
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