Exhaust pops?

[Jimmy]

Hello🙋‍♂️I've given in. 

I have a 2005 2.0tfsi A4 200bhp

jetex catback, r8 coils, new plugs , new pcv and Valves cleaned, other than that standard. 

Ive noticed a popping only when idling? Needle doesn't move a bit. It's like a faint rumble. Car drives perfect no problems apart from gear change from 1st -2nd feels Like you've twisted a Rubik's cube the wrong way. My friend plugged a obd2 into it and everything was spot on. Hopefully someone can help😄