Short Description
The repair procedures given by the manufacturer in this document are based on the technical specifications current when it was prepared. The procedures may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed.
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Content
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MEASURING THE INJECTOR RETURN FLOW
The vehicle does not start
– Carry out a start-up sequence (15 seconds using the engine starter).
– Measure the level of fuel in the pipe (E).
+ If the fuel level in one of the pipes is higher than 10 cm in relation to the average of the three other pipes: The injector fuel return flow rate is not correct.
+ Otherwise:
The injector fuel return flow rate is correct.
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The vehicle starts
– Set the diagnostic tool to parameter reader to check PR 083 Rail pressure.
– Start the engine and the chronometer.
– Increase the engine speed until the pressure inside the rail is as close as possible to 550 bars without exceeding an engine speed of 3000 rpm
– Release the accelerator pedal after a period of 60 seconds.
– Let the engine idle for 10 seconds.
– Turn the engine off.
– Measure the quantity of fuel contained in each measuring cylinder.
+If the quantity of diesel in a measuring cylinder exceeds 50 ml: The injector fuel return flow is not correct.
+If the quantity of diesel in each measuring cylinder is less than 50 ml: The injector fuel return flow is correct.
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