199002956 - D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE

0PRELIMINARY CHECKSAll OKProblems encounteredOperation
First, check:- the condition of the air filter;- the condition of the air intake circuit;- that there are no obstructions in the exhaust pipeMove on to Step 1Obstruction in the air intake circuitEliminate the obstruction; if necessary, replace the filter element    Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
Air intake via the inlet manifold/throttle body sealRestore the correct seal.
Exhaust pipe blockedRestore the operation of the exhaust pipe.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check:- no faults in the engine management control unit;- parameter plausibilityEnd of diagnosisError detected in the control unitContinue following the instructions on the diagnostic equipment
Parameter not consistentContinue following the instructions on the diagnostic equipment
2SUPERCHARGING SYSTEM CHECKAll OKProblems encounteredOperation
Check the supercharging system by carrying out the    See Test 1064BB SUPERCHARGING PRESSURE SOLENOID (PIERBURG) VALVE OPERATION CHECK    See Test     See Test Move on to Step 3Turbo solenoid valve defectiveReplace the solenoid valve    Op. 1064B38 WASTE GATE SUPERCHARGING PRESSURE ADJUSTMENT SOLENOID VALVE - R.R.
Signal at turbo solenoid valve does not conformRestore the correct signal.
Turbocharger defectiveChange the turbocharger    Op. 1064A27 TURBOCHARGER UNIT AND EXHAUST MANIFOLD - R.R.after having established the cause of the defect
Waste-gate valve stuckChange the turbocharger    Op. 1064A27 TURBOCHARGER UNIT AND EXHAUST MANIFOLD - R.R.
3FUEL PRESSURE TESTAll OKProblems encounteredOperation
Check the fuel supply pressure by carrying out    See Test 1056BI FUEL SYSTEM RETURN PRESSURE CHECK    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECKMove on to Step 4Fuel pressure too low: pipes obstructedEliminate the constrictions
Fuel pressure too low: pump defectiveReplace the pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4IGNITION SYSTEM CHECKAll OKProblems encounteredOperation
Inspect the spark plugs and check that they are working properlyCheck the operation of the ignition coils by carrying out    See Test 5510CI IGNITION COIL OPERATION CHECK    See Test 5510CE IGNITION CONTROL SIGNAL CHECKMove on to Step 5Spark plugs defectiveReplace spark plugs    Op. 5510D10 SPARK PLUGS - R+R
Coil defectiveReplace coils    Op. 5510C14 IGNITION COIL/S - R.R.
5KNOCK SENSOR CHECKAll OKProblems encounteredOperation
Check the detonation sensor is working properly using the ExaminerMove on to Step 6Connection defectiveRestore correct connection.
Wiring defectiveRestore the correct wiring.
Detonation sensor defectiveReplace the knock sensor    Op. 5510C42 DETONATION SENSOR (ONE) - R.R.
6AIR PRESSURE SENSOR CHECKAll OKProblems encounteredOperation
- 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 7Sensor defectiveReplace the pressure sensor
Wiring brokenRestore wiring continuity
7INJECTOR CHECKAll OKProblems encounteredOperation
Check that the injectors are operating correctly by carrying out    See Test 1056BA INJECTOR OPERATION CHECKCheck that the injector needle seal is correctMove on to Step 8Injector stuck/incorrectly adjustedReplace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
Connections not correctRestore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
8ENGINE WATER TEMPERATURE SENSOR CHECKAll OKProblems encounteredOperation
Check that the sensor operates correctly by carrying out    See Test 1056BC Engine coolant temperature sensor operation checkMove on to Step 9Temperature sensor defectiveReplace the sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
Connections not correctRestore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
9ACCELERATOR PEDAL CHECKAll OKProblems encounteredOperation
Check that the accelerator pedal is working correctly    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT Move on to Step 10Accelerator pedal potentiometer defectiveReplace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
Connections not correctRestore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
10MOTORIZED THROTTLE CHECKAll OKProblems encounteredOperation
Check that the motorized throttle is working properly, carrying out    See Test 1056BW Check on the throttle body actuator operationMove on to Step 11Motorized throttle defectiveReplace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
Connections not correctRestore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
11BRAKING SYSTEM CHECKAll OKProblems encounteredOperation
Check that the brakes do not offer resistance to the wheelsMove on to Step 12Wheels brakedRestore the correct operation of the braking system.
12CYLINDER COMPRESSION CHECKAll OKProblems encounteredOperation
Carry out the cylinder compression check    Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVEDMove on to Step 14Cylinder compression insufficientMove on to Step 13
13CHECK ON CAUSE OF INSUFFICIENT COMPRESSIONAll OKProblems encounteredOperation
R.R. head    Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal.Check condition of cylinders/piston ringsMove on to Step 14Valve seal insufficientOverhaul the head    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
Cylinders/piston rings wornRestore the correct seal.
14ENGINE CONTROL UNIT CHECKAll OKProblems encounteredOperation
Check that the engine control unit is working properlyEnd of diagnosisEngine management control unit defectiveReplace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R