I have heard sizzling and gurggling on my well NX7.6 But it runs, idles and blasts just fine!! but you might wanna try turning the lsn in(clockwise) just a touch more. It sounds like it is "loading" when at idle. But only turn in 1/8 increments. Do you have the [link=http://www.rchardware.com/]N-tune Tuning Dial[/link]. It will help emensly while tuning your engine on a daily basis..

I hope this helps

Oh and your very welcome, thats what we are here for...