Originally Posted by Jeff@topgearsolutions
Normally I would say leaky injectors, but in most respects, the N54 and poor idle is the same as water is wet. I bought my car new with 1.3 miles on it, and the idle was crap then too.
However, new injectors doesn't mean the were coded correctly, or they sat correctly. Usually a leaky injector shows signs of fouling plugs in those cylinders.
Check your plugs, if they are all the same color, your injectors are probably fine, so you can rule them out again.
I did all the work, i double checked the values on the injectors and i will check again today. but I'm 99.9% sure they are coded and installed right everything is torqed to spec, and the plugs are new lol the car is literally 1 day old of a 3 month coma.. i was expecting a new car that just rolled out of the dealer haha i should have took the block off and got it bored. and ported the head.. LOL to rule out everything.