Hi Sir, Are you there, I have the same problem with my Nissan Sunny 1998 B14 GA 14 engine in which I am experiencing rough idling at 500 to 600 RPMs. The same is true when i rev in 2nd to 3rd gear, it starts rattling and seems like missing.
My WhatsApp number is 0323-2177755 and i would love to have your answers as well as other experienced people who have faced the same issue and fixed it. Jazzak Allah.