When the car start up perfectly, there are no smoke.
But let me make this in two situations ok.

Both situations are under PERFECT start up ok.
1) Have to keep on gas for a LONG time (long time = 5 to 15 mins) then the RPM will be stable at 750-900RPM)
2) start right up with no stepping on gass needed (or maybe 3-10 seconds of gas), but RPM will be going down to like 350RPM - 500RPM at the first 2-4 seconds (a few sec) then it will go up to like 600-700RPM for a while (like a few more seconds) then will slowly go back up to 800 or 900 RPM.

The above two situations are under: ABLE TO MAKE the car start up without driving on Highway.
If needed to drive around, then even at STOP lights or stop sign or changing Gear from D to R, I HAVE TO GIVE A SLIGHT gas (like at 1000RPM) when applying brake.

So what could it be?
I went to autozone today... Battery is fine, alternator is fine, starter is fine.
WHAT THE HELL????

Gil