1st off i'd like 2 say hi to every1, names tom from west bromwich an own a vec b 2.2 engine z22se. i am havin a bit of trouble with my car misfiring with error codes p0300 been to garage 2day and its not spark plugs and not the coil pack (garage replaced them) also error p0420 so had pre cat checked and cat replaced and still no luck, has anybody got any ideas of what might be wrong?
thanks