198001693 - D003 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)

Metallic noises are coming from the engine, which change when the throttle opens. It sounds like popcorn popping - Excessive knock

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Battery correctly fastened to earth    See E1010 POWER SUPPLY	Move on to Step 1	Fastening to earth incorrect	Restore the correct wiring.
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check:- that there are no faults in the engine management control unit;- parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions on the diagnostic equipment
2	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Check the fuel supply pressure, if necessary on the road (to reproduce the conditions in which the problem occurs)    Op. 0520G46 FUEL SYSTEM - CHECK SUPPLY PRESSURE USING THE EXAMINER	Move on to Step 3	Pressure not correct: obstructions in the fuel supply pipe	Remove the obstructions in the fuel pipe, replace it if necessary
			Pressure not correct: petrol pump damaged	Replace the petrol pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
3	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Inspect the spark plugs and check their operationCheck for any coil defects by carrying out    See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 4	Spark plugs defective	Replace spark plugs    Op. 5510D10 SPARK PLUGS - R+R
			Coil leakage	Replace coils    Op. 5510C14 IGNITION COIL/S - R.R.
4	AIR INTAKE SYSTEM CHECK	All OK	Problems encountered	Operation
	- Check the condition of the air intake circuit;	Move on to Step 5	Air intake circuit faulty (air entering via the intake manifold gasket)	Restore the correct seal.
			Air intake circuit faulty (air entering via the throttle body gasket)	Restore the correct seal.
5	KNOCK SENSOR CHECK	All OK	Problems encountered	Operation
	Check the correct operation of the knock sensor by carrying out the    See Test 5510CH Check on operation of knock sensor	Move on to Step 6	Connection defective	Restore correct connection.
			Wiring defective	Restore the correct wiring.
			Knock sensor defective	Replace the knock sensor    Op. 5510C42 DETONATION SENSOR (ONE) - R.R.
6	ENGINE TEMPERATURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working properly by carrying out the    See Test 1056BC Engine coolant temperature sensor operation check	Move on to Step 7	Engine temperature sensor not working correctly.	Replace the engine temperature sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
7	INJECTOR OPERATION CHECK	All OK	Problems encountered	Operation
	Check the condition of the injector connectionsCheck the condition of the wiringCheck that the injectors are operating correctly by carrying out    See Test 1056BA Injector operation check	Move on to Step 8	Connections defective	Renew the correct connections
			Wiring defective	Restore the correct wiring.
			Injector defective	Replace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
8	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