Exhaust Backfires In Deceleration; Engine Revs Irregularly; Poor Performance At Full Throttle - APRILIA SR MAX 125 ie Service Station Manual

SR MAX 125 ie

Exhaust backfires in deceleration

Possible Cause
Presence of faults detected by the self diagnosis
Correctness of the parameters
Intake system sealing (infiltrations)
Fuel system (low pressure)
Exhaust system sealing (infiltrations)

Engine revs irregularly

ENGINE IRREGULAR PERFORMANCE WITH VALVE SLIGHTLY OPEN
Possible Cause
Intake system cleaning
Intake system sealing
Ignition system
Parameter reliability
TPS reset successful
Presence of faults detected by the self diagnosis

Poor performance at full throttle

POOR ENGINE PERFORMANCE AT FULL POWER/ ENGINE IRREGULAR PERFORM-
Possible Cause
Presence of faults detected by the self diagnosis
EXHAUST BACKFIRES WHEN DECELERATING
ANCE ON PICKUP
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 sleeve
Filter box
Fuel pump
Pressure regulator
Fuel filter
Injector capacity
Manifold - head
Manifold - silencer
silencer welding
Operation
Air filter
Diffuser and throttle valve
Additional air pipe and Stepper
Intake sleeve
Filter box
Spark plug wear check
Throttle valve position signal
Coolant temperature indicator
Intake air temperature indicator
Ignition advance
TPS reset successful
Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Coolant temperature
Lambda probe
Operation
Pump relay
HV coil
Injector
Revolution timing sensor
Injection
INJEC - 167