alright this has been a problem for a couple months now, i have a jdm H22 with skunk2 pro 1 cams, valves and retainers,and intake manifold, stock bottom end. Its been tuned and runs perfectly but about a month later after it was tuned i noticed at idle it nows spits A LOT of black water/moisture of somesort out of my exhaust, but when drving normally it doesnt smoke or spit anything out, but then if its at full throttle it smokes like a damn diesel, dark black smoke. I dont understand this because of the following:
1). I use fully synthetic mobil 1 oil and it shouldnt be burning black if its oil it should be bluish.
2). I've done both a compression test and leakdown test, both turning out to be in perfect running order
3). I replaced the valve seals also just to see if that was the problem but it didnt help at all either.

I dont know what it could be, somebody suggested it was a fuel related problem maybe running to rich or an injector stuck open hence the spitting out the exhaust and dark Black smoke. anybody have any ideas??? reps will be rewarded thanks