Would a knackered R.C.gasket screw up my spark plugs by letting oil onto them?
Getting a long hesitation on full load before it takes off and a slightly weaker boost than normal.
Once over 4k revs seems ok but something is defo not quite right. I'm %90 sure its not the AFM but I guess it could also be BCS? Knackered plugs sound like the most likely tho as there is quite a bit of oil leaking around the rocker cover. The plugs are denso iridiums and are only about 3 months old. Any opinions welcome!