I recently upgraded to stainless steel piping/walbro fuel pump however my actuator kong twice resulting over boost.Recently my con rod bengkok and piston damaged.
there are a few solutions for RB coilpacks misfiring problem,
1. splitfire coilpack
2. buy new standard coilpack from nissan original parts
3. buy kedai potong coilpack
4. run coils from other cars (example - mitsu...