Engine Knocking; Presence Of Knocking (Head Knocking); Fuel Supply System - PIAGGIO MP3 400 i.e. Service Manual

Injection

Engine knocking

Possible Cause
Presence of faults detected by the self diagnosis
Ignition efficiency
Parameter reliability
Intake system seal
TPS reset successful
Fuel supply
Selection of the cylinder base gasket thickness

Fuel supply system

The fuel supply circuit includes the electric pump, the filter, the pressure regulator, the electro-injector
and the fuel delivery pipes.
The electrical pump is located in the tank from which the fuel is pumped and sent to the injector through
the filter.
The pressure is controlled by the pressure regulator situated in the pump assembly in the tank.
INJEC - 12

PRESENCE OF KNOCKING (HEAD KNOCKING)

Operation
Pump relay
HV coil
Injector
revolution timing sensor
Air temperature
Coolant temperature
Lambda sensor
Spark plug
Throttle valve position signal
Coolant temperature indicator
Intake air temperature indicator
Ignition advance
Intake sleeve
Filter box
TPS reset successful
Fuel pressure
Fuel filter
Injector capacity
Fuel quality
Selection of the cylinder base gasket thickness
MP3 400 i.e.