Possible Cause Operation
System not efficient, repair according to the indi-
cations of the self-diagnosis
Presence of faults detected by the self diagnosis
Pump relay
HV coil
Injector
revolution timing sensor
Fuel supply
Fuel in the tank
Fuel pump activation
Fuel pressure (low)
Injector capacity (low)
Power to the spark plug Shielded spark-plug cap HV coil (secondary insulation)
Parameter reliability
Coolant temperature
Distribution timing - injection ignition
Intake air temperature
End of compression pressure End of compression pressure
Starting difficulties
ENGINE START-UP PROBLEMS
Possible Cause Operation
Presence of faults detected by the self diagnosis
Pump relay
H.V. coil
Injector
revolution timing sensor
Air temperature
Coolant temperature.
Atmospheric pressure
Start up engine speed
Starter motor and remote control
Battery
Ground connections
End of compression pressure End of compression pressure
Power to the spark plug
Spark plug
Shielded cap
HV coil
Rpm-timing sensor
Ignition advance
Fuel supply
Fuel pressure (low)
Injector capacity (low)
Injector seal (poor)
Correctness of the parameters
Coolant temperature
Stepper throttle valve position intake air tempera-
ture (steps and actual opening)
Cleaning of the auxiliary air pipe and throttle valve;
air filter efficiency
Engine stops at idle
ENGINE DOES NOT HOLD IDLING/ IDLING IS UNSTABLE/ IDLING TOO LOW
Possible Cause
Operation
Presence of faults detected by the self diagnosis
Pump relay
H.V. coil
Injector
revolution timing sensor
Injection Nexus 500 euro 3
INJEC - 198
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