22 · Diagnostics

Engine starts with difficulty

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Starting › Engine starts with difficulty

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Fault diagnosisEngine starts with difficulty

ENGINE STARTS WITH DIFFICULTY

1.9 JTD 8V

The engine, especially when cold, starts with difficulty only after repeated attempts. When the key is turned, the instruments light up, the starter motor turns, but the engine has trouble starting.

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 seal of the fuel pipes and connectors	Continue to Step 1	The i.e. warning light comes on and remains on	See table K50 I.E. FAILURE WARNING LIGHT ON
			Presence of dirt in the fuel tank	Clean the fuel tank Op. 1040A24
			Fuel pipes damaged	Renew or replace the pipes (see Assembly 1040B)
1	AIR CIRCUIT CHECK	All OK	Problems met	Operation
	Check, in order: the condition of the air filter the condition and seal of the air supply circuit	Continue to Step 2	Air cleaner dirty or partially blocked	Replace the air filter Op. 1048A14
		Continue to Step 2	Circuit component damaged	Replace the component (see Assembly 1048A)
2	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 3	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 3	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT)
3	FUEL FILTER CHECK	All OK	Problems met	Operation
	Check the operation of the fuel filter	Continue to Step 4	Presence of water, petrol, paraffin or dirt detected	Clean the tank and pipes and replace the filter element Op. 1044B20
4	DIESEL FILTER CHECK	All OK	Problems met	Operation
	Check the operation of the diesel heater on the filter:	Continue to Step 5	Fuel pre-heating not working	Replace the fuel heater Op. 1044D10
5	CHECK RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check the pressure between the manifold and the return pipe to the tank: See Test 1060A Check low pressure fuel circuit	Continue to Step 6	Pressure over 1bar: the return circuit to the tank is clogged	Eliminate any blockages in the return pipe or in the cage for the low pressure pump immersed in the tank
6	CHECK DELIVERY LOW PRESSURE	All OK	Problems met	Operation
	Check the pressure between diesel filter and high pressure pump See Test 1060B Check low pressure fuel circuit	Continue to Step 7	Leaks in circuit	Eliminate fuel leaks from low pressure circuit pipes/connectors
			Pressure less than 1.8 bar or difference in pressure between Test B and Test A less than 1 bar	Replace the fuel pump Op. 1040A70
			Pressure over 3.5 bar	Replace valve on diesel filter mounting Op. 1044B16
7	FUEL INJECTOR LEAK TEST	All OK	Problems met	Operation
	Check injectors for diesel leaks: See Test 1060C Check high pressure fuel circuit	Continue to Step 8	Leak detected from one or more injectors	Replace injector(s) Op. 1060F10
8	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Check diesel pressure parameter measured using diagnostic instrument: See Test 1060D Check high pressure fuel circuit	Continue to Step 9	Pressure reading below 150 bar	Replace high pressure pump Op. 1060E10
		Continue to Step 9	Leaks in circuit	Eliminate fuel leaks from high pressure circuit pipes/connectors
9	VALVE CLEARANCE CHECK	All OK	Problems met	Operation
	Check that the valve tappet clearance is correct. Op. 1036H14	Continue to Step 10	Clearance not correct	Restore the correct valve clearance. Op. 1036H18
10	CYLINDER COMPRESSION CHECK	All OK	Problems met	Operation
	Carry out the cylinder compression test Op. 0510A10	Continue to Step 11	Compression values not correct	Restore the correct cylinder compression, e.g by checking the seal of the injectors Op. 1060F10and the cylinders if necessary
11	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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