My cossie (2wd saph) had been running well for a few weeks now since the rebuild. Was a bottom end build. I decided to check the CO before turning the boost up (running a GGR stage 1 chip). Checked the CO and it wa at 1.13% so gradually incresed it till it was upto 2.5% but was missing on number 3 cylinder now. I took the plug out to find oil on it and on top of the piston Now it wont run right at all. Im going to try and set the fuelling back down to 1.14% again tomorrow and see if the car runs right again. It seems to be a bit of blue but mostly a grey/white smoke out the back and is really starting to hack me off

Please help