Throttle lag, sooty exhaust.
08 FN2, 65k miles.
My boss told me today, that when I left work the other night, I left a trail of soot from my exhaust. I've also had some throttle lag recently too, where pressing the throttle in even lower gears can cause a noticable lag, where power seems to dip for a moment. It mostly happens when cold, but has also happened to a lesser degree when warmed up.
Could this be a fuelling issue, like a blocked filter? Could the K&N replacement filter that I have just recently binned be at fault, maybe allowing the throttle body to get too dirty? Maybe injectors?
The car feels a little flat, with the snap into vtec not being as 'snappy' lately. But sometimes it still feels like a little rocketship!
It's well serviced, having had an oil/filter change in the last month, as well as a clutch, flywheel and gearbox fluid. I've also had the valve clearances checked in the last few weeks.