I have started working out again but only cardio because I want to loss as much weight as possible. I am 3 months post op and not sure when I should add in weight training into the workouts. Any advice about timing of weight training into my work outs to still loss weight.

You need to weight train now because you're losing muscle mass as you lose weight. The muscle on your body helps increase your metabolism which in turn helps you lose weight. I say start now. I've been lifting weights since the day I came home from the hospital. Not only am I totally satisfied with my weight loss after 3 months, but I can really see a difference in how my body looks, muscle wise.

Just do it!

I agree!