147 CF4 engine issues
i have a 147 with CF4 engine , and have had egr blanked and patched in software. i have also had the metal swirl flaps removed and software patch installed.
my question is what sort of problems/issues has anyone had after doing this mod. my MPG is at best 39mpg and although the performance is pretty good i have great plumes of smoke out the back at various times , usually after coasting along and then accelerating
i have put cataclean through once, i have checked and cleaned carefully the MAP & MAF sensors, also checked pipework for leakages or holes, i think the car is overfuelling.
Should the swirl flap holes be blocked, or maybe a rolling road/remap.
What problems/issues has anyone else had?