198001694 - D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	First, check:- the condition of the air filter;- the condition of the air intake circuit;- that there are no obstructions in the exhaust pipe	Move on to Step 1	Obstruction in the air intake circuit	Eliminate the obstruction; if necessary, replace the filter element    Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
			Air intake via the inlet manifold/throttle body seal	Restore the correct seal.
			Exhaust pipe blocked	Restore the operation of the exhaust pipe.
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check:- no faults in the engine management control unit;- parameter plausibility	End of diagnosis	Error detected in the control unit	Continue following the instructions on the diagnostic equipment
			Parameter not consistent	Continue following the instructions on the diagnostic equipment
2	SUPERCHARGING SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the supercharging system by carrying out the    See Test 1064BB SUPERCHARGING PRESSURE SOLENOID (PIERBURG) VALVE OPERATION CHECK    See Test 1064BF WASTE GATE VALVE PRESSURE CHECK    See Test 1064BG CHECK ON CORRECT WASTE GATE VALVE ACTUATOR TRAVEL	Move on to Step 3	Turbo solenoid valve defective	Replace the solenoid    Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R.
			Signal at turbo solenoid valve does not conform	Restore the correct signal.
			Turbocharger defective	Change the turbocharger    Op. 1064A27 PIPE BETWEEN VACUUM RESERVOIR AND ACTUATOR CONTROL SOLENOID VALVE - R.R.after having established the cause of the defect
			Waste-gate valve stuck	Change the turbocharger    Op. 1064A27 PIPE BETWEEN VACUUM RESERVOIR AND ACTUATOR CONTROL SOLENOID VALVE - R.R.
3	FUEL PRESSURE TEST	All OK	Problems encountered	Operation
	Check the fuel supply pressure by carrying out    See Test 1056BI FUEL SYSTEM RETURN PRESSURE CHECK    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK	Move on to Step 4	Fuel pressure too low: pipes obstructed	Eliminate the constrictions
			Fuel pressure too low: pump defective	Replace the pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Inspect the spark plugs and check that they are working properly.Check the operation of the ignition coils by carrying out    See Test 5510CI IGNITION COIL OPERATION CHECK    See Test 5510CE IGNITION CONTROL SIGNAL CHECK	Move on to Step 5	Spark plugs defective	Replace spark plugs    Op. 5510D10 SPARK PLUGS - R+R
			Coil defective	Replace coils    Op. 5510C14 IGNITION COIL/S - R.R.
5	KNOCK SENSOR CHECK	All OK	Problems encountered	Operation
	Check the detonation sensor is working properly using the Examiner	Move on to Step 6	Connection defective	Restore correct connection.
			Wiring defective	Restore the correct wiring.
			Detonation sensor defective	Replace the knock sensor    Op. 5510C42 DETONATION SENSOR (ONE) - R.R.
6	AIR PRESSURE SENSOR CHECK	All OK	Problems encountered	Operation
	- Check that the air pressure/temperature sensor is working properly by carrying out the    See Test 1056BU CHECK ON OPERATION OF PRESSURE SENSOR AND/OR INTAKE AIR TEMPERATURE SENSORCheck the continuity of the wiring between the sensor and the engine control unit    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 7	Sensor defective	Replace the pressure sensor
			Wiring broken	Restore wiring continuity
7	INJECTOR CHECK	All OK	Problems encountered	Operation
	Check that the injectors are operating correctly by carrying out    See Test 1056BA Injector operation checkCheck that the injector needle seal is correct	Move on to Step 8	Injector stuck/incorrectly adjusted	Replace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
8	CHECKING THE ENGINE COOLANT TEMPERATURE SENSOR	All OK	Problems encountered	Operation
	Check that the sensor operates correctly by carrying out    See Test 1056BC Engine coolant temperature sensor operation check	Move on to Step 9	Temperature sensor defective	Replace the sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
9	ACCELERATOR PEDAL CHECK	All OK	Problems encountered	Operation
	Check that the accelerator pedal is working correctly    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 10	Accelerator pedal potentiometer defective	Replace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
10	MOTORIZED THROTTLE CHECK	All OK	Problems encountered	Operation
	Check that the motorized throttle is working properly, carrying out    See Test 1056BW Check on the throttle body actuator operation	Move on to Step 11	Motorized throttle defective	Replace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
11	BRAKING SYSTEM CHECK	All OK	Problems encountered	Operation
	Check that the brakes do not offer resistance to the wheels	Move on to Step 12	Wheels braked	Restore the correct operation of the braking system.
12	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check    Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED	Move on to Step 14	Cylinder compression insufficient	Move on to Step 13
13	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	R.R. head    Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal.Check condition of cylinders/piston rings	Move on to Step 14	Valve seal insufficient	Overhaul the head    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
			Cylinders/piston rings worn	Restore the correct seal.
14	ENGINE CONTROL UNIT CHECK	All OK	Problems encountered	Operation
	Check that the engine control unit is working properly	End of diagnosis	Engine management control unit defective	Replace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R