Still hesitating after MAF change

[wawa]

Hello all

I finaly change the MAF hoping to correct my engine loss of power and hesitation on my 2000 S. Well its still the same. Acceleration is not hard and past 5k its struggle. Still engine runnning good when in granny driving mod.

I had a code pending once (p1126 I think) but it disappear. Was not pending before I change de MAF and not pending eather after my 30 min test drive. I did a couple of hard accelaration, highway driving, city driving. after the test drive I did 2 quick stop at some store, and when restarting the car, got a hugh smoke cloud.

So what do you thing?
I still have some part coming from pelican for a good tune up that I think the car never have.Spark plug, fuel filter and AOS. Throttlr body is clean and air filter new too.

Thanks
Chris