How To Stop Drawing Lower Irons and Driver?

by James
(Georgia, USA)

I shoot around an 80 almost everywhere i play, and recently shot a 78. I hit my LW-8iron perfect, plenty of distance with some great height on the shots. 8iron goes about 168. As soon as i pull the 7iron out and any club from there on the draw gets worse. its almost to the point were a 5 iron is out of the question. How can i keep the same straight ball flight as i progress through my irons up to my driver.
Thanks