125000493 - D01 ENGINE NOT RUNNING SMOOTHLY / (HESISTANT)
There is a (prolonged) fall in performance (flat spots) during acceleration| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Conduct a preliminary check on the condition of the air intake circuit | Move on to Step 1 1 | Air intake circuit faulty | Restore the correct operation of the intake circuit | |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Connect the diagnostic test equipment (Examiner or other instruments) to the tester input. Check:
| Move on to Step 2 1 | "Fuel system" error detected | Proceed as instructed in theSee table See table Z50 MIXTURE STRENGTH ERROR | |
| Another error detected in the control unit | Continue following the instructions for the diagnostic equipment | |||
| Parameter not consistent | Continue following the instructions for the diagnostic equipment | |||
| 2 | ROAD TEST USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected. Check:
| Move on to Step 3 1 | The sudden onset of an error in the control unit is detected | Continue following the instructions for the diagnostic equipment | |
| Parameter not consistent | Continue following the instructions for the diagnostic equipment | |||
| 3 | FUEL PRESSURE CHECK | All OK | Problems encountered | Operation |
| Carry out a road test, reproducing the conditions in which the problem occurs.Check the fuel supply pressure Op. Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE | Move on to Step 4 1 | Pressure not correct: obstructions in the fuel supply pipe | Remove the obstructions in the fuel pipe, replace it if necessary | |
| Pressure not correct: tank not sufficiently ventilated | Restore the tank ventilation | |||
| Pressure not correct: petrol pump damaged | Replace the petrol pump assembly Op. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R | |||
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists: control unit defective | Replace the engine management control unit Op. 1056B82 | |