Possible Cause Operation
Intake system sealing (infiltrations) Intake manifold - head
Throttle body - manifold
Intake sleeve
Filter box
Fuel system (low pressure) Fuel pump
Pressure regulator
Fuel filter
Injector capacity
Analysis of exhaust fumes before the catalytic converter Trimmer value adjustment (CO % adjustment)
Exhaust backfires in deceleration
EXHAUST BACKFIRES WHEN DECELERATING
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
Correctness of the parameters Throttle valve position sensor
Stepper
Coolant temperature sensor
Intake air temperature sensor
Intake system sealing (infiltrations) Intake manifold - head
Throttle body - manifold
Intake sleeve
Filter box
Fuel system (low pressure) Fuel pump
Pressure regulator
Fuel filter
Injector capacity
Exhaust system sealing (infiltrations) Manifold - head
Manifold - muffler
Analyser socket
Muffler welding
Analysis of exhaust fumes before the catalytic converter Trimmer value adjustment (CO % adjustment)
Engine revs irregularly
IRREGULAR PROGRESS OF THE ENGINE WITH VALVE SLIGHTLY OPEN
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
Intake system cleaning Air filter
Diffuser and throttle valve
Additional air pipe and Stepper
Intake system sealing Intake sleeve
Filter box
Ignition system Spark plug wear check
Parameter reliability Throttle valve position signal
Coolant temperature indicator
Intake air temperature indicator
Ignition advance
TPS reset successful TPS reset successful
Analysis of exhaust fumes before the catalytic converter Trimmer value adjustment (CO % adjustment)
Beverly 500 i.e. Injection
INJEC - 179
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