Check the following, in order:

- no leaks in fuel circuit;

- condition of the air intake circuit;

- no obstructions in the catalytic converter;

- no water or impurities in the fuel

Fuel filter very blocked

Replace the catalytic converter

Op. 1080B62 CATALYTIC CONVERTER - R + R

Replace the fuel filter

Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Carry out a road test, keeping the diagnostic equipment connected.

Make sure that the conditions in which the problem occurs are reproduced

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Replace the accelerator pedal

Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R

Check the condition of the motorized throttle actuator connection

Check the condition of the wiring

Check that the motorized throttle is working properly by doing the following:

See Test 1056BW Check on the throttle body actuator operation

Replace the motorized throttle

Op. 1056B14 THROTTLE CASE - R + R

Inspect the spark plugs, checking:

- for possible electrode wear;

- for carbon deposits;

- for any damage to the spark plug insulator;

- that the distance between the electrodes is correct;

- the correct HV signal, by doing the following:

See Test 5510CI IGNITION COIL OPERATION CHECK

Replace spark plugs

Op. 5510D10 SPARK PLUGS - R+R

Replace coils

Op. 5510C14 IGNITION COIL/S - R.R.

Replace the injector

Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT

Replace the electric pump

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

Replace the engine management control unit

Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

Check the following, in order:

- no leaks in fuel circuit;

- condition of the air intake circuit;

- no obstructions in the catalytic converter;

- no water or impurities in the diesel fuel;

- fuel filter very blocked

Replace the catalytic converter

Op. 1080B62 CATALYTIC CONVERTER - R + R

Check using the

See T CHECK ON CHANGE IN PRESSURE AT THE FUEL FILTER

that the difference in pressure upstream and downstream of the filter is less than 0.5 bar

Replace the fuel filter

Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Carry out a road test, keeping the diagnostic equipment connected.

Make sure that the conditions in which the problem occurs are reproduced

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Replace the accelerator pedal

Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R

Replace the injector

Op. 1060F10 FUEL INJECTORS - R.R.

Replace the EGR solenoid

Op. 1080C24 E.G.R. SYSTEM SOLENOID - R + R

Replace the air valve

Op. 1080C24 E.G.R. SYSTEM SOLENOID - R + R

Check that the brake pedal switch is working properly

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

Eliminate the cause of the problem

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

Check that the electric pump is receiving the correct power supply by doing the following:

See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE

Check that the air flow meter is working correctly

Check the continuity of the wiring between the air flow meter and the engine management control unit by carrying out the following:

See Test 1060GS FLOW METER OPERATION CHECK

Replace the air flow meter

Op. 1060G10 AIR FLOW METER - R.R.

Check that the Lambda sensor is working properly by performing the following:

See Test 1080BI Check on operation of Lambda sensor heater

and the

See Test 1080BA Check on the operation of the upstream Lambda sensor

Replace the sensor

Op. 1080B62 CATALYTIC CONVERTER - R + R

Replace the engine management control unit

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R

Check the following, in order:

- no leaks in fuel circuit;

- condition of the air intake circuit;

- no obstructions in the catalytic converter;

- no water or impurities in the petrol - fuel filter very blocked

Replace the catalytic converter

Op. 1080B62 CATALYTIC CONVERTER - R + R

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Carry out a road test, keeping the diagnostic equipment connected.

Make sure that the conditions in which the problem occurs are reproduced

Check:

- that there are no errors in the control unit;

- parameter plausibility.

Replace the accelerator pedal

Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R

Check the condition of the motorized throttle actuator connection

Check the condition of the wiring

Check that the motorized throttle is working properly, carrying out

See Test 1056BW Check on the throttle body actuator operation

Replace the motorized throttle

Op. 1056B14 THROTTLE CASE - R + R

Inspect the spark plugs, checking:

- for possible electrode wear;

- for carbon deposits;

- for any damage to the spark plug insulator;

- that the distance between the electrodes is correct;

- the correct HV signal, by carrying out the

See Test 5510CI IGNITION COIL OPERATION CHECK

See Test 5510CE IGNITION CONTROL SIGNAL CHECK

See Test 5510OB IGNITION COIL RESISTANCE CHECK

Replace spark plugs

Op. 5510D10 SPARK PLUGS - R+R

Replace coils

Op. 5510C14 IGNITION COIL/S - R.R.

Using the Examiner, check in active diagnosis that all the injectors are working properly.

Identify any injector that may be mechanically stuck shut.

Replace the injector

Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT

Check that the electric pump is receiving the correct power supply by carrying out the following:

See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE

Replace the electric pump

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

Replace the engine management control unit

Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R