Injector leakage test

If there is a decrease in pressure to below the values mentioned above, check the section of the system upstream of the manifold and if there are no leaks or damage to the fuel supply pipe, replace the electric fuel pump drip tray assembly because the pressure regulator is housed in the actual unit and CANNOT be replaced.

If, after repeating the check, the pressure exceeds the recommended figure and is considerably higher, replace the electric fuel pump beucase there are operating problems with the pressure regulator housed in it.

If the pressure corresponds to the recommended figure, check the seal of the fuel manifold and the injectors following the procedure described in the paragraph below.

Injector leakage test

1. Complete electric fuel pump
2. Fuel supply pipe
3. Adaptor (A)
4. Test equipment No. 1860955000
5. Adaptor (B)
6. Fuel manifold
7. Rapid attachment connector
8. Injectors

Keep the test equipment in the same position as described in the previous paragraph, place valve (b) in the maximum open position, keeping valve (c) closed and valve (a) in the maximum open position. Turn the ignition switch to the ON position and observe whether, after increasing to around 3.5 bar, the pressure on the gauge (e) settles down at a pressure of about 3.2 bar, then close valve (a) and check that the pressure remains constant for at least a minute; if this is not the case, there is a leak from one or more injectors.