Engine not running smoothly / (losing power)

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Engine › Engine not running smoothly / (losing power)

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Fault diagnosisEngine not running smoothly / (losing power)

ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER)

1.6 16v

The engine does not run smoothly in all conditions (load, speed, etc.).

In particular, there are irregular, even prolonged, decreases in performance revealed by abrupt pulling

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: that there is no water, other fluid or dirt in the fuel tank the state of the spark plugs and leads engine wiring earth correctly fixed battery earth correctly fixed positive lead between battery and alternator correctly fixed	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank Op. 1040A24
			Spark plugs dirty or damaged	Clean or replace the spark plugs Op. 5510D10
			Spark plug leads damaged	Replace the spark plug leads Op. 5510D14
			Earth leads incorrectly fixed	Restore battery earth lead Op. 5530B22
			Battery positive earth incorrectly fixed	Restore battery positive lead Op. 5530B26
1	CHECK 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 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	INJECTOR CHECK	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other iinstruments) carry out the active diagnosis of the iinjectors.	Continue to Step 3	Injector connections faulty	Restore the connection of the injectors with the control unit, ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT)
		Continue to Step 3	Injectors faulty	Replace the injectors Op. 1056B70
3	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

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Parts & tools for this job For 1998 Fiat Multipla

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