I bought a new 255lph Walbro and finally installed it today. Startup and idle are much better but I still noticed hesitation and backfiring when I took it for a test drive. I think I am going to take it to a tuner. I've been looking around on this forum and other places and heard about 555 Motorsports. They seem to have the best rates and are about two hours away from me. Does anyone have any experience that they would recommend them?