My 3sgte is acting up..., Anyone else ever see this? Options

[DG_Performance]

My car runs rich and i know that is a little bit of my problem but....
about every few minutes i get a huge puff of smoke that lasts about 5 seconds comming out of my exhaust and then goes away????
then my car runs fine and looks like there is no probs
few minutes later there it goes again... what could this be from
the puff of smoke is huge and if there is a car behind me when it happen , i cant see the car by the time it stops smoking!!!
why would this only happen every so often and not constantly if something was wrong i am not sure.

anyone got any ideas on this? i got no oil in my antifreeze, no water in my oil, and my turbo is brand new so its not that either.

i am thinking valve seals or ???? but still i am confused at why it only happens every so often

what are all you other 3s people running as far as oil in your engines
i got 10w40
i was just wondering
thanks

[DG_Performance]

well i get a blue light smoke between shifts cause of rich conditions i am guessing. but the huge puff of smoke is mostly white looking but the amount is the crazy part. you guys dont understand the puff is huge for 5 seconds and then stops and looks fine
only fuel change i did to my car was change the fuel pump to the 255lph
and it is set to run constantly though
????? that still dont explain my huge smoke problem though
dg