hi, this is my first post, i have recently bought a 2.2 sri 150, i have loved driving it for a few days, all seemed fine for the few days except it was abit smokey when i pull my foot down, but still quick, with no real power issues, i left it to sit on my drive for a few days, i wanted to find out why it was smoking, decided to change the oil and filter, and from that point on its seems to have no power, it was also misfiring, i think i have cured that issue by changing the spark plugs, it sounds much better but when i drove it i was disappointed with the lack of power,, can someone please give me some advice as to what i should be looking for ,, thanks ,, ps i have done a compression test today (i assume the ring were gone) , got 65psi on all cylinders dry and 75 psi wet, can anyone help on this , is this very low as i read it should be much higher but did not increase very much during wet test,,