125000464 - B13 ENGINE STARTS WITH DIFFICULTY''
The engine, particularly when cold, 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.| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Check the following, in order:
| Move on to Step 1 1 | air intake circuit component | Repair or replace the damaged component | |
| Filter blocked | replace the air filter Op. Op. 1048A10 AIR CLEANER FILTERING ELEMENT - REPLACE | |||
| Leaks from the diesel pipes | Adjust pipe tightness to correct setting and replace if necessary. | |||
| Water, petrol, paraffin or dirt found to be present | Clean the tank and pipes and replace the diesel filter cartridge Op. Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE | |||
| obstruction in the exhaust system | Replace the damaged system component | |||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check:
| Move on to Step 2 1 | Error detected in the control unit | Continue following the instructions for the diagnostic equipment | |
| Parameters not plausible | Continue following the instructions for the diagnostic equipment | |||
| 2 | HIGH PRESSURE CHECK | All OK | Problems encountered | Operation |
| With the diagnostic equipment connected to the diagnostic socket.Check as described in the Test See Test 1060D ELECTRONIC DIESEL INJECTION CONTROLthat the diesel pressure parameter is correct | Move on to Step 10 1 | Pressure not correct | Move on to Step 3 1 | |
| 3 | LOW RETURN PRESSURE CHECK | All OK | Problems encountered | Operation |
| Check as described in the Test See Test 1060A LOW RETURN FUEL PRESSURE CIRCUIT CHECKthat the pressure in the return pipe to the tank is less than 1 bar | Move on to Step 4 1 | Pressure above the maximum limit: return pipe to the tank obstructed | Repair the pipe, if necessary, replace it | |
| 4 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Check as described in the Test See Test 1060B LOW FUEL PRESSURE SUPPLY CIRCUIT CHECKcheck that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar | Move on to Step 10 1 | Pressure below the minimum limit or above the maximum limit | Move on to Step 5 1 | |
| 5 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Clse the return pipe downstream of the low pressure regulator valve, in the fuel filter cover, using the special tool, and carry out the Test again See Test 1060B LOW FUEL PRESSURE SUPPLY CIRCUIT CHECKwith the pipe closed, checking that the filter outlet pressure remains below 2 bar | Move on to Step 6 1 | Pressure rises to 5 bar: pressure regulator valve on filter mounting incorrectly adjusted | Replace the diesel filter cover | |
| 6 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Check that the difference in pressure upstream and downstream of the filter is less than 1 bar | Move on to Step 7 1 | Difference in pressure more than 1 bar | Replace the diesel filter cartridge Op. Op. 1044B20 FUEL FILTER FILTERING ELEMENT - REPLACE | |
| 7 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Check that the supply pump pressure at the filter inlet is more than 2.2 bar | Move on to Step 10 1 | Pressure below 2 bar | Move on to Step 8 1 | |
| 8 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Measure the difference in pressure between the electrical pump outlet and the filter inlet checking that it is less than 0.3 bar | Move on to Step 9 1 | Difference in pressure more than 0.3 bar | Replace the pipe | |
| 9 | LOW SUPPLY PRESSURE CHECK | All OK | Problems encountered | Operation |
| Check, as described in , that the pump supply voltage is equal to 12 volt and that the current absorbed is between 2 and 10 Ampere | Move on to Step 10 1 | Voltage < 12 volt | Check electrical wiring See See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |
| Current > 10 Amps: pump defective | Replace the fuel pump assembly Op. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + R | |||
| Current < 2 Amps: pump obstructed | Replace the fuel pump assembly Op. Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GUAGE CONTROL - R + Rand clean the fuel tank | |||
| 10 | CHECK CORRECT OPERATION | All OK | Problems encountered | Operation |
| Replace the DRV high pressure regulator and check that the fault is no longer present | End of diagnosis | Fault persists | Move on to Step 11 1 | |
| 11 | CHECK CORRECT OPERATION | All OK | Problems encountered | Operation |
| Replace the high pressure pump and check that the fault is no longer present | End of diagnosis | Fault persists | Move on to Step 12 1 | |
| 12 | CYLINDER COMPRESSION CHECK | All OK | Problems encountered | Operation |
| Carry out the cylinder compression check | Move on to Step 14 1 | Cylinder compression insufficient | Move on to Step 13 1 | |
| 13 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems encountered | Operation |
- R/R head [PR_1016C10] for valve leakage test
| Move on to Step 14 1 | Valve seal insufficient | Overhaul the cylinder head Op. Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL | |
| Cylinders/piston rings worn | Restore the seal | |||
| 14 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists: control unit defective | Replace the engine management control unit Op. Op. 1060G80 DS ELECTRIC INJECTION CONTROL UNIT - R R | |