D05 ENGINE DOES NOT PRODUCE BEST PERFORMANCE - Fiat - MULTIPLA - eLearn

2888336 - D05 ENGINE DOES NOT PRODUCE BEST PERFORMANCE

The engine runs smoothly at medium-low speeds, but does not reach iits usual maximum performance (both in terms of speed and acceleration)

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: the condition of the air intake circuit for possible obstruction of the catalyzer and other exhaust pipes for any obstacles to the complete accelerator pedal travel	Continue to Step 1	Air intake circuit component damaged	Replace the component (see Assembly 1048A)
			Catalyzer obstructed	Replace the catalyzer Op. 1080B62
			Exhausts obstructed	Replace the component involved (see Assembly 1076B)
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the engine management control unit the plausibility of all the parameters.	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
2	CHECK ON FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op. 0510C10	Continue to Step 3	Filter dirty	Replace the filter element Op. 1044B20 Restore the condition of the filter, the pipes and the heater device
	Check the fuel supply pressure Op. 0510C10	Continue to Step 3	Pressure not correct	Replace the fuel pump assembly Op. 1040A70
3	CHECK ON TIMING	All OK	Problems met	Operation
	Check that the engine timing is correct	Continue to Step 4	Timing not correct	Restore the correct engine timing Op. 1032B14
4	CHECK KNOCK SENSOR	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) check the knock sensor signal	Continue to Step 5	Knock sensor faulty	Replace knock sensor Op. 5510C42
			Connections not correct	Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
			Pressure over 3.5 bar	Replace valve on diesel filter mounting Op. 1044B16
9	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists