on my chevy i have a throttle body spacer, full length headmen headers, hotter igntion, 2 1/2 inch exhaust with x pipe and 40 series center in center out flowmasters and 33inch baja claws. Im looking for more performance for pulling trailers and im having a few issues. Firsti cant get the truck to idle right it idles anywhere from 900rpm to 1300rpm when in gear with my foot on the brake, ive adjusted the idle screw all the way out and it still wont do what i want it to do. second the cruise control just stopped working, all the fuses seem to be fine i have replaced the box on the firewall off another truck whee it worked and have checked the plug with a test light and it all seems to be ok there. but it still doesnt work. any help would be great thanks!