Is there a way to identify F1 injectors? The reason im asking is because 2 months ago I had a local diesel shop install reman injectors and tips from F1 in my truck. The Truck started missing and under power so I had them check them again. They said 3 were bad and i had gas in my fuel tank at one time. I know for a fact that I have never put gas in the tank unless it was mixed at a station that i wasnt aware of. So i have sent a fuel sample off for testing, but the more I think about it the more I begin to wonder if they are trying to weasle their way out of replacing them. I am a mechanic so I do have the know how and access to the proper tools to inspect them. any help would be greatly appriciated thanks. oh my truck is a 06 dodge 5.9l