My friend and I just completed this mod along with the bypass valve bypass on '13 1.4t sedan.
I am on a stock tune, which I read shouldn't be a problem.
Car seems to be running fine. She started right up, sounded normal, but the began to stumble a bit at idle. At this point, I got a flashing CEL, which eventually turned solid. We drove the car to get the codes pulled and while it didn't seem to feel as fast as it used to, it seemed to wake up after about 15 minutes of driving.
As to the two codes she is throwing (sorry, don't have the actual number):
1. Cylinder 2 misfire
2. Something that specifically mentioned as coming from the turbo's BPV solenoid, which seems odd to me as it was bypassed at this point.
But as it sits, the car is running great. Hard pulls all the way to fuel cut off. First time I really got some enjoyment from the button shifting on my auto, lol.
Anyone have any thought on the code? We cleaned extremely well as we went, but is it possible that some of plastic particulate made it's way into cylinder 2 and fouled up the plug or something of that nature?
Anyways, that for the great DIY guides, they are great for a broke college student like myself.