my vauxhall corsa 1.0 3cylinder seems to be hesitating when pulling away and even some times struggeling to pull!! i've already changed the air flow sensor which seemed to cure it at first but hasn't!?
My Corsa 1.2 did this & I replaced the accelerator cable. Seems to have improved it a lot. Check your cable isn't slack where the injector is. Maybe your car could do with a good service, oil change etc. Try injector cleaner too. You can get a bottle from Halfords for under a fiver. Redex is good.