Have 07 coupe 1.8 Manuel car went into limp mode catalytic converter was the issue in the obd2 swapped it still had misfires on all cylinders so changed spark plugs injectors and coils 2 misfires went away but still have cylinders 2 and 4 misfiring really confused on what it could be regular maintenance always done 143k miles on odometer no burning oil either drives fine until it goes into limp mode any advice ?