My truck mainly hesitates only when I try to gently press the accelerator for smooth starts. If I punch the pedal, the truck takes off and there is no hesitation at all. I purchased the fuel filter and was all set to install (once I figured out where the darn thing was!!) but my mechanic warned me that the fuel filter on these was a pain in the butt to replace. So I've been avoiding the task but I'd really like to try and change it so I may crawl under and attempt the job. Any things to look out for or avoid before I get started??