I don't believe it's your injectors. I had two stuck open, blowing black smoke for 720 miles, truckers came on the CB and said they would be ticketed if they smoked like that. I was pulling a 25 ft trailer with a F350 dually on it. Coming out of Columbus OH on SR33 I had a 30MPH head wind, best I could do was 45 MPH at 2800 RPM. But I definitely did NOT have a knock like I heard in your video, actually just noise like any IDI makes.