I also have the URD kit and have not had several of the problems that you speak of. However, I did have a check engine light come on a few time after the install. After many many hours of tuning both in car, and dyno, it seems that I am leaning out at about 4800rpm. During the dyno runs, we threw tons of fuel at the engine at these ranges and it did not matter...still lean. It appears that I may have a dirty filter. I remember when I did the install the fuel tank was full of this white floating crap. Almost like paper that did not disolve. It could have been the sticker adhesive that I found floating around inside my tank when I droped it. Anyway, I think you nailed it...dirty fuel filter. I am going to drop my tank and clean it thouroughly before I change my filter. BTW, how does your truck run? I had mine dyno'd at 267 torque, and 249 horse at the rear tires. I was impressed and the guy from split second said those were some of the highest numbers he had seen. Just curious to see how the rest of you are doing. <img src="/forums/images/graemlins/patriot.gif" alt="" />