I have a 1999 Volkswagen passat 1.8 t I fix a lot of things in the car already Because I've had a misfire cylinder number four I get weird codes as an cylinder number four misfire and misfire and random cylinders I've tried changing vacuum lines EGR valve Spark plugs coil Packs Even then so I still get misfire rentable multiple misfires in different cylinders As well and cylinder number four