Hi , iam having troubles with mk3 rs. I changed spark plugs ( NGK ) 0.6 , coils ( Valeo ) and now even injector ( oem bosch ). In Clip car is doing missfire on every cylinder. My rs mechanic told me to leave it be if it doesnt show on dashboard but it making me worried every time. In idle after driving i can hear missfire from exhaust. Running wagner intercooler , gt perf catalyst , map should be set to 300hp and 420nm (not sure about it). First lambda probe shows 70 and in second it shows 800mV. Its going up and now like on roller coaster. ( bad probe ? ) Car was standing whole winter so there is still old 100 petrol in it. Map should be set for decat so can issue be that i have rn catalyst ? Any ideas how to fix it or should i be worried about it ? Thanks and iam kinda new here so dont hate me please.
