APRILIA SCARABEO 500 2008 Service Station Manual page 237

SCARABEO 500
Possible Cause
Intake system seal (seepage)
Fuel supply (low pressure)
Exhaust backfires in deceleration
EXHAUST BACKFIRING WHEN DECELERATING
Possible Cause
Faults detected by self-diagnosis
Correctness of the parameters
Intake system seal (seepage)
Fuel supply (low pressure)
Exhaust system seal (seepage)
Engine revs irregularly
REGULAR ENGINE PROGRESS WITH VALVE SLIGHTLY OPEN
Possible Cause
Intake system cleaning
Intake system seal
Ignition system
Parameter reliability
Operation
Coolant temperature sensor
Intake air temperature sensor
Intake manifold - head
Throttle body - manifold
Intake manifold
Filter housing
Fuel pump
Pressure regulator
Fuel filter
Injector flow
Operation
Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Coolant temperature
Lambda Probe
Throttle valve position sensor
Stepper
Coolant temperature sensor
Intake air temperature sensor
Intake manifold - head
Throttle body - manifold
Intake manifold
Filter housing
Fuel pump
Pressure regulator
Fuel filter
Injector flow
Manifold - head
Manifold - muffler
Muffler welding
Operation
Air filter
Diffuser and throttle valve
Supplementary air pipe and Stepper
Intake manifold
Filter housing
Spark plug wear check
Throttle valve position signal
Coolant temperature signal
Intake air temperature signal
Injection
INJEC - 237