172 misfire

[Emajane]

My 172 Cup is still misfiring after having new coil pack, leads and plugs, initially running on 3 then it has not dropped to two. Code reader P0300, multiple misfire

Any ideas?

 

[richd]

i had same problem with mine recently, replaced plugs, coil pack and leads but still misfired, in the end i replaced the injector and that sorted it out.