I have completely replaced all hoses from the regulator, to the dither valves, to the carburator, I have swapped the o2 sensor, the mixer(with throttle body and electronic throttle control), i have swapped the regulator and dither valves(dither valves were bad, I have new ones on order). and now my truck surges/lopes during idle untill the truck warms up. The truck also has new spark plugs, PCV valve rattles/blows through only 1 directions and has great vacuum when hooked up. As stated in other threads, If i unplug the wire harness from the dither valves, the surging goes away. Please Help!! (this all started with a code 771 and dither valves you could blow through)