Ok, so I think I already know whats going on but I just wanted to confirm with ya'll that it is indeed bad injectors and not something else possibly and what to look out for.

So I threw on some EV14 550's (laser etched bosch) onto my 1.8t. I paid $150 for the 4. I thought: wow! what a good price for genuine bosch injectors (what the ebay listing said). I thought, if they were knockoff ev14's, they wouldn't be laser etched bosch or something else would look amiss (i.e.: no Viton o-rings, other strategies to cut cost etc) so I thought I was indeed getting genuine bosch.

As I read on I found out (assumed) that the only way to assure fuel injectors are good (genuine bosch or otherwise) is to get them flow tested for consistency.

I've calibrated my LTFT's as low as I could get them and they still fluctuate at part throttle from .8%-3.5% and no matter what direction I move KRKTE, these percentages move into positive numbers further and further but not evenly. Basically saying I'm having a tough time getting consistent results from small tweaks.

so the conclusion i'm getting at is: I probably bought shit injectors right?

I'm thinking I may go with FIC 650cc's

update if you've seen my setup previously:
Still cone filter
back to pneumatic recirculating DV

No DTC's

Ok thanks for the clarification

One more suggestion: MAF tube with flow straightener, cone filter and 6"+ before MAF sensor?

could that work?

Very informative answer, thank you.
 Yea thats what i assumed, plus they must calibrate both components on the flow bench during the r&d phase.

I heard the mustang guys had issues with their cars stalling suddenly upon lift and shifting into neutral on the highway. The box probably prevents most of that erratic behavior im going to assume.

I’ll prob be hitting the junkyard for a box soon