Originally Posted by Osiris 75

Ok, I have about 12 tanks through my Sirio now. And now when I run it, after I let off of the throttle I get this gargling sound. When it idles it sounds fine, when I pinch the fuel line it revs up. But when I gun it, I can't get up to full speed, and when I let off, it gargles while it revs up for about 2 or 3 seconds, then it goes back to idle. Any ideas of what this may be, or what may cause this??