Workshop Manuals Factory service & repair

Fiat Idea Factory Service Manual (2003-2012)22 · Fault diagnosis

22 · Diagnostics

Clutch vibrating or jerking

Make: Fiat
Model: Idea Factory Service Manual
Year: 2003–2012
Section: Clutch › Clutch vibrating or jerking

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Fault diagnosisClutch vibrating or jerking

CLUTCH VIBRATING OR JERKING

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Set off from a standstill releasing the clutch gradually, and check whether acceleration is jerky (discontinuous advancement). Drive the car at constant speed (equal to about 1000 rpm in 4th gear) and, with the clutch pedal release, accelerate rapidly, pressing the accelerator to the floor instantly. Check whether advancement is discontinuous (jerky).	Continue to Step 1	Advancement is discontinuous (jerky)	Check the engine and/or fuel injection mountings
1	CHECK ON CLUTCH LEVER TRAVEL	All OK	Problems met	Operation
	Check, inside the engine compartment, that when the clutch pedal is pressed, the clutch control lever on the gearbox performs the correct travel	Continue to Step 3	Incomplete travel of clutch lever on gearbox	Continue to Step 2
2	CHECK ON CLUTCH PEDAL	All OK	Problems met	Operation
	After disconnecting the clutch pedal from the transmission, check that it travels freely without tight spots or stiffness	Continue to Step 3	Play or stiffness on clutch pedal	Replace the pedal Op. 3330B26
3	CHECK ON CLUTCH RELEASE LEVER AND BEARING (WITH GEARBOX REMOVED)	All OK	Problems met	Operation
	After removing the gearbox, check that the lever is not stiff (because of dirty or insufficient lubrication) and that the clutch release bearing runs freely in its seating and shows no signs of damage	Continue to Step 4	The presence of dirt or wear caused by insufficient lubrication does not allow the clutch release bearing to slide correctly	Replace the faulty or damaged parts
4	CHECK ON CLUTCH ASSEMBLY	All OK	Problems met	Operation
	Visual check on the condition of the clutch assembly, on which there should be no breaks (pressure plate) and/or obvious damage (driven plate) Measurements using the gauge as per manual	Continue to Step 5	Obvious damage of clutch disc and/or breakage of pressure plate	Replace the assembly Op. 1810A24
5	CHECK ON SPLINED CLUTCH HUB	All OK	Problems met	Operation
	Check, in order: that there is no excess grease on the clutch plate hub bushes and the gearbox main shaft; condition of hub and main shaft	Continue to Step 6	Main shaft damaged, hub worn, excessive grease on bushes	Replace hub and/or main shaft
6	CHECK ON FLYWHEEL CONDITION	All OK	Problems met	Operation
	Check the condition of the flywheel In particular, check: condition of surface; wear; chips; signs of overheating	Continue to Step 7	Flywheel damaged	Replace the flywheel Op. 1024B10
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2003 Fiat Idea

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