I had the same problem with mine a while back. It is probably a worn out needle jet. Make sure that the needle seats into the slide good, and make sure that the c-clip is not too small or it will get pressed up. That's what mine did. Also make sure none of the jets are clogged. You might just want to take your pilots out and clean em out real good, you should be able to see through them. Make sure that you use the right screwdriver also, you dont want to strip the pilots as they are expensive...