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Test results |
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Check for loose electrical connections at the coil connector, the injectors and at the engine management control unit. |
Go to Step 2 |
Presence of loose electrical connections. |
Restore the correct connections. |
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Check for breaks in the wiring continuity caused by oxidised or corroded terminals See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT |
Go to Step 3 |
Breaks in the wiring continuity. |
Restore the correct continuity for the wiring. |
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Check the condition of the wiring insulation (possible short circuit to Vbatt of coil and/or injector control) |
Go to Step 4 |
Wiring insulation faulty. |
Restore correct wiring insulation. |
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Check that the fuel pump is working properly by performing the See Test 1040AB SUBMERGED FUEL PUMP CHECK |
Go to Step 5 |
Fuel pump faulty |
Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R |
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Check the quality of the fuel and check for the presence of water. |
Go to Step 6 |
Fuel not compliant. |
Replace the fuel with fuel that is compliant |
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Check for the presence of any seepage in the intake/exhaust manifold |
Go to Step 7 |
Seepage inside the intake/exhaust manifold. |
Restore correct operation |
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Carry out cylinder compression test Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED |
Go to Step 8 |
Cylinder compression insufficient. |
Go to Step 9 |
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Check: |
Go to Step 9 |
1. Cylinder head tightening not correct. 2. Gasket damaged. 3. Oil seal compromised. |
1. Restore the correct cylinder head tightening. 2. Replace the cylinder head gasket Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET 3. Restore the correct oil seal. |
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After having removed the cylinder head Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET Check: |
Go to Step 10 |
1. Valve seal insufficient. 2. Cylinder/ring wear outside tolerance. |
1. Overhaul the cylinder head. 2. Restore correct operating clearances. |
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Check that the timing is correct |
Go to Step 11 |
Timing not correct. |
Restore the correct timing |
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Check the pressure from the manifold pressure sensor by connecting the diagnostic equipment |
Go to Step 13 |
Pressure value incorrect |
Go to Step 12 |
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Check that the intake pressure sensor is working properly by carrying out the See Test 1056BU CHECK ON OPERATION OF PRESSURE SENSOR AND/OR INTAKE AIR TEMPERATURE SENSOR |
Go to Step 13 |
Intake pressure sensor not working properly. |
Replace the intake pressure sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R. |
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Check that the fluid level is correct. |
Go to Step 14 |
Presence of engine oil in the combustion chamber |
Overhaul the engine. |
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Check the condition of the spark plugs (fouling by engine oil or unburnt fuel) and that they are working properly. |
Go to Step 15 |
Spark plugs fouled. |
Replace spark plugs Op. 5510D10 SPARK PLUGS - R+R |
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Check that the injectors are working properly by carrying out the See Test 1056BA INJECTOR OPERATION CHECK |
Go to Step 16 |
Injectors not working properly. |
Replace the injectors Op. 1056B68 SET OF INJECTORS - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMENT |
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Check that the ignition coils are working properly by carrying out the See Test 5510CI CHECK ON OPERATION OF IGNITION COILS and the See Test 5510OB IGNITION COIL RESISTANCE CHECK |
Go to Step 17 |
Ignition coils not working. |
Replace ignition coils Op. 5510C14 IGNITION COIL/S - R.R. |
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Check the position of the rpm sensor, rpm sensor/phonic wheel gap, phonic wheel status (possible impacts) and conformity of phonic wheel. |
Go to Step 18 |
Rpm sensor not correctly positioned/gap too large. |
Restore the correct operation of the sensor. |
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Check that the engine management control unit is working properly. |
End of diagnosis |
Engine management control unit faulty. |
Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |