So I own a 2004 s4 v8 automatic 68k miles… so it has no power and has a weird code saying failure Fran shaft sensor. I replaced it and code still comes up. I’ve replaced all coils all pugs and still get a misfire code. I replaced all crank sensors 2 of them. Replaced cam sensors, MAF sensors coils , plugs… still lack of power, anyone know what else it can be?
Welcome to the forum.
What other modifications have been done to the car or is the car 100% stock.
Have you done a compression test…
I’m sure we can help you sort out what the issue is.