Fuel Supply System - VESPA 946 E4 EMEA 2021 Manual

Vespa 946 E4-E5 EMEA-USA-ASIA (2021-)
Engine knocking
PRESENCE OF KNOCKING (COMBUSTION SHOCKS)
Possible Cause
Faults detected by self-diagnosis
Ignition efficiency
Parameter reliability
Intake system sealing
TPS reset successful
Fuel system
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.
Operation
Pump relay
H.V. coil
Injector
Engine speed timing sensor
Air temperature
Engine temperature
Lambda probe
Spark plug
Throttle valve position signal
Engine temperature signal
Intake air temperature signal
Ignition advance
Intake sleeve
Filter housing
TPS reset successful
Fuel pressure
Fuel filter
Injector flow
Fuel quality
Selection of the cylinder base gasket thickness
Injection
INJEC - 199