It's always worth doing a redex flush, but it ain't going to cure it if the injectors are leaking. You'll know if they have blow back because of the distinctive noise if gives out. It's almost like an old steam traction engine. The other thing you can ask is if they'll listen to the engine with a stethoscope type thing. The guys who did my injectors (HiQ, really good buch of guys and do the job for 100 quid) checked mine out this way and they checked them again six months later.
I had a problem with my passenger door handle too. Mine was the cable had come away from a plastic retainer that holds it in place when you pull the door lever. Really really easy fix, the door car is easy to get off too. Screw under the bottom of the door grab handle and one at the top, take the covering off for where the electric windows would be. Also a screw where the door lever is, should be a plastic cap to pop off. One screw where the door opens near the wing mirror and one screw at the bottom left of the door.
My Vito has always had that lovely turbo whistle when accelerating. Particularly in third. You gotta love it!!!!
I had a problem with my passenger door handle too. Mine was the cable had come away from a plastic retainer that holds it in place when you pull the door lever. Really really easy fix, the door car is easy to get off too. Screw under the bottom of the door grab handle and one at the top, take the covering off for where the electric windows would be. Also a screw where the door lever is, should be a plastic cap to pop off. One screw where the door opens near the wing mirror and one screw at the bottom left of the door.
My Vito has always had that lovely turbo whistle when accelerating. Particularly in third. You gotta love it!!!!