199002949 - B013 ENGINE STARTS WITH DIFFICULTY

Test results
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.
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
First check: air filter condition; air intake circuit condition; that the exhaust pipe is not blockedMove on to Step 1Obstruction in the air intake circuitEliminate the problem, if necessary, replace the filter element    Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
Air intake via the intake 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:- that there are 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
2FUEL PRESSURE TESTAll OKProblems encounteredOperation
Check fuel supply pressure by carrying out the following tests:    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK    See Test 1056BI FUEL SYSTEM RETURN PRESSURE CHECK    See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKEMove on to Step 3Fuel 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
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 coils by carrying out    See Test 5510OB IGNITION COIL RESISTANCE CHECK    See Test 5510CI IGNITION COIL OPERATION CHECK    See Test 5510CE IGNITION CONTROL SIGNAL CHECKMove on to Step 4Spark plug defectiveReplace spark plug    Op. 5510D10 SPARK PLUGS - R+R
High voltage cable connection leakingReplace HV cable
High voltage cable connection slackTighten HV cable correctly
Ignition coil defective.Replace ignition coils    Op. 5510C14 IGNITION COIL/S - R.R.
4INJECTOR CHECKAll OKProblems encounteredOperation
Using the Examiner in active diagnosis, check that the injectors are working properly by carrying out the    See Test 1056BA INJECTOR OPERATION CHECKCheck that the injector needle seal is correctMove on to Step 5Injector 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
Injector seal not intactReplace the injectors    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
5CHECKING THE ENGINE COOLANT TEMPERATURE SENSORAll OKProblems encounteredOperation
Check that the sensor operates correctly by carrying out    See Test 1056BC Engine coolant temperature sensor operation checkMove on to Step 6Temperature sensor defectiveReplace the sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
Connections not correctRestore 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 7Accelerator pedal potentiometer defective.Replace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
Connections not correct.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 Check on the throttle body actuator operationMove on to Step 8Motorized throttle defectiveReplace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
Connections not correct.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
Perform the cylinder compression test by carrying out the    Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS Move 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 11Valve seal insufficientOverhaul the head    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
Cylinders/piston rings wornRestore 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