I have this anoying whistle coming from the carb at part throttle. It sounds like a vacume leak. The engine is new as are all the gaskets. I have sprayed wd around the ports and found nothing. So, I pulled the ronchester off and replaced it with a rebuilt carter yf from my old jeep. It runs good except less power. But now the sound is even louder. When your cruising down the road at part throttle you dont here it, but give it a little gas and its right there. In case anyone is wondering this is on a non intergral 250, and it does not have any smog ports above the exhaust. Any ideas?
