TT chip or equivalent ASAP. Then you can begin a proper diagnosis of your idling issue which may or may not be associated (I'm leaning towards not) to the hypertech chip. Do you also have at least a scanmaster? If not it's a must
Until you really learn the car and the tuning aspects of it I would advise you to assume any knock you see is real knock and not to ignore it. So whatever it is you're doing when there's knock, stop doing that. In the meantime go about your upgrades starting with the fuel system and chip. Just...
I just replaced mine. I searched hi and lo for a replacement. My original was even sold by a vendor here on the board a long time ago. I can't remember the name off the top of my head. Good quality piece. Couldn't find them ANYWHERE! So I went with QTP (quick time performance) begrudgingly. So...
They're all right. Make what you have perfect 1st if it isnt already. What exactly are you starting with? Is it completely stock? How many miles? Ever rebuilt? How old are your vacuum hoses? Ever done a leakdown test? Has the fuel filter ever been changed? I could go on and on. As your level of...