323000723 - D003 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)

Metallic noises are coming from the engine which change when the throttle opens and it sounds like popcorn popping - excessive detonation
Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Battery correctly fastened to earth    See E1010 POWER SUPPLY Move on to Step 1Fastening to earth incorrectRestore the correct wiring.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
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 plausibilityMove on to Step 2Error detected in the control unitContinue following the instructions on the diagnostic equipment
2FUEL PRESSURE CHECKAll OKProblems encounteredOperation
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 EXAMINERMove on to Step 3Pressure not correct: obstructions in the fuel supply pipeRemove the obstructions in the fuel pipe, replace it if necessary
Pressure not correct: petrol pump damagedReplace the petrol pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
3IGNITION SYSTEM CHECKAll OKProblems encounteredOperation
Inspect the spark plugs and check their operationCheck for any coil defects by carrying out    See Test 5510CI IGNITION COIL OPERATION CHECK    See Test 5510CE IGNITION CONTROL SIGNAL CHECK    See Test 5510OB IGNITION COIL RESISTANCE CHECKMove on to Step 4Spark plugs defectiveReplace spark plugs    Op. 5510D10 SPARK PLUGS - R+R
Coil leakageReplace coils    Op. 5510C14 IGNITION COIL/S - R.R.
4AIR INTAKE SYSTEM CHECKAll OKProblems encounteredOperation
Check the condition of the air intake circuit;Move on to Step 5Air 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.
5KNOCK SENSOR CHECKAll OKProblems encounteredOperation
Check the knock sensor is working properly using the ExaminerMove on to Step 6Connection defectiveRestore correct connection.
Wiring defectiveRestore the correct wiring.
Knock sensor defectiveReplace the knock sensor    Op. 5510C42 DETONATION SENSOR (ONE) - R.R.
6ENGINE COOLANT TEMPERATURE SENSOR CHECKAll OKProblems encounteredOperation
Check that the engine temperature sensor is working properly by carrying out the    See Test 1056BC ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECKMove on to Step 7Engine temperature sensor not working correctly.Replace the engine temperature sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
7INJECTOR OPERATION CHECKAll OKProblems encounteredOperation
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 CHECKMove on to Step 8Connections defectiveRenew the correct connections
Wiring defectiveRestore the correct wiring.
Injector defectiveReplace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
8ENGINE CONTROL UNIT CHECKAll OKProblems encounteredOperation
Check that the engine control unit is working properlyEnd of diagnosisEngine management control unit defective.Replace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R