The euro spec type r FN2,has two sensors located,the first before the precatalyst,and the second before the main catalytic converter.
They are responsible for measuring the temperuture of the exhaust gases and regulating the air fuel ratio!
They don't work properly and as a result the motor does not keep stable rpm!We change them for free because they are been covered from guarantee,but this is not a solution!
I'm asking if someone, Si owner has ever come up against with such a problem and how he solve it!!!