Before we get started, let me first say the MAFS are clean, and throttle body is clean, as is the idle valve. New spark plugs, proper gas, closed gas lid.
I filled up my car the last two times, after which the car sputters and stalls for the first mile of driving. It was really low the first time, like 3 bars, so I figured that's why it did this. This time, it was at a 1/4 of a tank, and it did it again.
Could this be from me removing the butterfly valve? Or, is it something else?