Push on the gas car doesn't want to go
 

1997 Plymouth Grand Voyager, 3.0 engine, 154K +

This is updated... While driving for a while, after stoping then accelerating like pulling in the driveway, the car hesitates or does not go.

I had a check engine light that pointed to a tune up, TPS problem and MAP sensor which I just replaced it a couple of months ago.

When pushing on the gas the van does not accelerate right away. I previously tuned up the van, replaced the TPS. I did not replace the MAP because I did that late in May.

Another thing the van sits at idle then when taking off smokes, grey/white.

What would be the suggested course of action. I am thinking gas treatment then testing whatever is suggested.

Thanks.