3233004 - B11 ENGINE STARTS WITH DIFFICULTY' / WHEN WARM

When the engine is warm, for example just after it has been switched off following a long journey, it does not start, or it starts with difficulty, only after repeated attempts. When the key is turned the instruments light up, the starter motor turns, but the engine does not start.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Preliminarily check:

  • the state of the spark plugs and leads
  • the condition of the air intake circuit
 Continue to Step 1 Spark plugs dirty or damaged Clean or replace the spark plugs Op.   5510D10 
Spark plug leads damaged Replace the spark plug leads Op.   5510D14 
Air intake circuit component damagedReplace the component (see Assembly 1048A)
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket

Check:

  • that there are no faults in the engine management control unit
  • plausibility of all the parameters
 Continue to Step 2 An error is detected in the control unitContinue according to the instructions for the diagnostic equipment
Lack of dialogue with the control unit Restore the connection between the engine management control unit and the diagnostic connector ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT ).
2ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of:

  • vapour recovery solenoid valve
  • Injectors
 Continue to Step 3 Solenoid valve connection faulty Restore the connection of the solenoid valve with the control unit ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT )
Solenoid valve faulty Replace the solenoid valve Op.   1080E24 
Injector connections faulty Restore the connection of the injectors with the control unit, ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT )
Injectors faulty Replace the injectors Op.   1056B70 
3COILS CHECKAll OKProblems metOperation
2.5 V6Using the diagnostic equipment (Examiner or other iinstruments), carry out the active diagnosis of the coils Continue to Step 4 Coils connection faulty Restore the connection for the coils with the control unit, ( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT )
Ignition coils faulty Replace the ignition coils Op.   5510C14 
1.6 TS 1.8 TS [d]

Check, in order:

  • the coils supply
  • the connection of the coils with the engine management control unit
  • the connection of the spark plugs to the coils
  • the operation of the coils
( See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT ) 		Continue to Step 4 Connections not correctRestore the connections
Ignition coils faulty Replace the ignition coils Op.   5510C14 
4FUEL PRESSURE CHECKAll OKProblems metOperation
Check the fuel supply pressure Op.   0510C10  . Continue to Step 5 Pressure not correct Replace the fuel pump assembly Op.   1040A70 
5CYLINDER COMPRESSION CHECKAll OKProblems metOperation
Carry out the cylinder compression test Op.   0510A10  . Continue to Step 6 Compression values not correct Restore the correct cylinder compression, for example, checking the seal of the injectors Op.   1056B70  and the cylinders (see OVERHAULING ENGINE, Subassembly 1004)
6TIMING CHECKAll OKProblems metOperation
Check that the engine timing is correct Continue to Step 7 Timing not correct Restore the correct engine timing Op.   1032B14 
7CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'