312000551 - B013 ENGINE STARTS WITH DIFFICULTY

The engine starts with difficulty and only after repeated attempts. When the key is turned the instruments light up as normal, the starter motor turns, but the engine is difficult to start.
Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation

First, check:

  • condition of the air filter;
  • the condition of the air intake circuit;
  • that there are no obstructions in the exhaust pipe
Move on to Step 11. Obstruction in the air intake circuit2. Air intake via the intake manifold/throttle body seal3. Exhaust pipe blocked1. Eliminate the problem, if necessary, replace the filter element    Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE. 2. Restore the correct seal.3. Restore 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:

  • that there are no faults in the engine management control unit;
  • parameter plausibility
End of diagnosis1. Error detected in the control unit2. Parameter not consistent1. Continue following the instructions on the diagnostic equipment2. Continue following the instructions on the diagnostic equipment
2FUEL PRESSURE CHECKAll OKProblems encounteredOperation
Check the fuel supply pressure    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECKMove on to Step 31. Fuel pressure too low: pipes obstructed2. Fuel pressure too low: pump defective1. Eliminate the constrictions2. Replace the 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 defects in the spark plug high tension leadsCheck the operation of the ignition coil by carrying out    See Test 5510OA IGNITION COIL RESISTANCE CHECK    See Test 5510CE IGNITION CONTROL SIGNAL CHECKMove on to Step 41. Spark plug defective2. High voltage cable connection leaking3. High voltage cable connection slack4. Ignition coil defective.1. Replace spark plug    Op. 5510D10 SPARK PLUGS - R+R2. Replace HV cable3. Tighten HV cable correctly4. Replace ignition coil    Op. 5510C14 IGNITION COIL/S - R.R.
4INJECTOR CHECKAll OKProblems encounteredOperation
Using the Examiner in active diagnosis, check that the injectors are working properlyCheck that the injector needle seal is correct by carrying out theSee Test Move on to Step 51. Injector stuck/incorrectly adjusted2. Connections not correct3. Injector seal not intact1. Replace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT 2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT 3. Change the injectors    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
5ENGINE 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 61. Temperature sensor defective2. Connections not correct1. Replace the sensorOp. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
6ACCELERATOR PEDAL CHECKAll OKProblems encounteredOperation
Check that the accelerator pedal is working correctlyMove on to Step 71. Accelerator pedal potentiometer defective.2. Connections not correct.1. Replace the accelerator pedalOp. 1068A14 ACCELERATOR PEDAL - R + R2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
7MOTORIZED THROTTLE CHECKAll OKProblems encounteredOperation
Check that the motorized throttle is working properly by carrying out the    See Test 1056BW THROTTLE BODY ACTUATOR OPERATION CHECKMove on to Step 81. Motorized throttle defective2. Connections not correct.1. Replace the motorized throttleOp. 1056B14 THROTTLE CASE - R + R2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
8TIMING CHECKAll OKProblems encounteredOperation
Check that the timing system timing is correctMove on to Step 9Timing system timing not correctRestore the correct timing.
9CYLINDER COMPRESSION CHECKAll OKProblems encounteredOperation
Carry out the cylinder compression checkMove on to Step 11Cylinder compression insufficientMove on to Step 10
10CHECK ON CAUSE OF INSUFFICIENT COMPRESSIONAll OKProblems encounteredOperation
R & R head to check valve sealCheck condition of cylinders/piston ringsMove on to Step 111. Valve seal insufficient2. Cylinders/piston rings worn1. Overhaul the head    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL 2. Restore the correct seal.
11ENGINE 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