I adjusted the floats and while I was at it I inspected the passages in the metering plate. It had sludge clogging one of the metering screw orifices. I also put a new power valve in it. The truck stated and ran fine with an ocassional exhaust pop. It was a little sluggish when pressing the throttle but that improved afterit warmed up. After a while we reved the engine it backfired and now I need another new power valve. I checked it by putting my finger over the front bowl vent and the engine died immediately. It still idles ok so will move to some other areas you guys have recommended. Thanks for all your input.
