Originally Posted by
anattaboy 
All my issues with gurgling and leaks were with the coil.
This ^ it started happening regularly to me so I went into the shop. They pointed out I was using too high voltage with the coils I'd been using. Ended up upgrading battery and tanks. I use double coil now with the higher voltage (up to 5.0). Don't think I've even had to change them for about 3 weeks actually. No leaking yet either.