Brother, i took my car to one of the local mechanics who I knew was good, just to replace these new Spark plugs with the ones that I removed earlier, and after installing them and starting the car, Civic started missing on idle and engine sound and exhaust was showing it, Then he checked each and every coil on which these plugs get attached, One of them wasn't producing any spark, He shook it and it started sparking but in a relatively less speed, So he told me one of the coils isn't working properly and this might be the reason it misses. And I told him to pack them as they are now, I'll replace them tommorow, So hopefully, I think this is the only reason my car does missing.
What do you think?
Moreover, these old spark plugs are still okay to be driven more or less 10k.
