Lagging problem.

Alright so here's the thing. I know people have talked about this before but I think mine is different. Upon trying to accelerate in my 8 it will lag and the rpm's drop. Sometimes it cuts me off and the restart is easy to moderate depending on how tempermental she is haha. Upon crank up after sitting for overnight or an extended period then a little white smoke comes out of the exhaust for about 6 seconds then clears. Ive come to the conclusion of plugs, wires, and coils but also have seen people say the engine coolant seal is bad and coolant is leaking into the engine so that would lead to a new engine/rebuild. The thing with that is the coolant level doesn't seem to be dropping enough if it were happening. Its been going on for about a little over 3 weeks or so. The car seems to idle fine as well.





The nearest Mazda dealer to me is like an hour to an hour and a half away so I don't even know if im able to make it there without something bad happening on the way.





Any good savy engine people know anything about this?