I've noticed when running VCM scanner that fuel cutoff never seems to happen when in 4th gear. It does go into 4 cyl mode though but fuel always stays on even though rpm parameters and such are met. Now if i go into 3rd gear then fuel cuts off like clockwork as expected. 4 CYL mode does not work in 3rd gear though. Does 4CYL mode prevent DFCO from occuring?