199002953 - D002 ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER)

Prolonged performance reductions occur under constant load and speed conditions.
Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation

First, check:

  • status of spark plugs and leads;
  • condition of the air filter;
  • the condition of the air intake circuit;
  • no obstructions at the catalyzer
Move on to Step 1Spark plugs dirty or damagedReplace the spark plugs    Op. 5510D10 SPARK PLUGS - R+R
Spark plug leads damagedReplace spark plug leads
Air intake circuit faultyEliminate the fault
Catalytic converter obstructedReplace the exhaust manifold    Op. 1072C16 EXHAUST MANIFOLD WITH CATALYTIC CONVERTER - R.R.
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Connect the Examiner diagnostic equipment to the diagnostic socket.

Check:

  • that there are no faults in the engine management control unit;
  • parameter plausibility
Move on to Step 2Error detected in the control unitContinue following the instructions on the diagnostic equipment
Parameter not consistentContinue following the instructions on the diagnostic equipment
2ROAD TEST USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.

Check:

  • that there are no faults in the engine management control unit;
  • parameter plausibility
Move on to Step 3The sudden onset of errors in the control unit is detectedContinue following the instructions on the diagnostic equipment
Parameters not consistentContinue following the instructions on the diagnostic equipment
3FUEL PRESSURE ROAD TESTAll OKProblems encounteredOperation
Carry out a road test and check the fuel supply pressure    Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE under the conditions in which the fault occursMove on to Step 4Fuel pressure too low: pipes obstructedEliminate the constrictions
Fuel pressure too low: valve obstructedReplace the fuel cap    Op. 1040A40 PLUG FOR FUEL FILLER PIPE - R + R
Fuel pressure too low: regulator blockedReplace the petrol pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
Fuel pressure too low: pump defectiveReplace the petrol pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
Fuel pressure too low: filter blockedReplace the petrol pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the fault is no longer presentThe fault persists: control unit defectiveReplace the control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R