OK, I'm getting frustrated with this one . . . I just picked up used 140DZ. The thing is not running right in the midrange, and seem slightly down on power (8800RPM with a Mejzlik 16X12 on Powermaster 30% DZ blend). Compared to my great running 160DZ, the 140 seems vague on high speed needle setting. Mine will run about the same at full throttle anywhere from 1-3/4 to 1-1/3 turns out. The idle is solid, but the midrange is soggy, and it has quit 3 times in the air at part throttle, the latest tonight on the second 45 line of a reverse cuban.

I ran it on the ground, and noticed there a lot of bubbles in the injector line at part throttle. Maybe the pump is bad?