ok on my friends 91 AWD TSI we are getting the the following codes... 31 said knock sensor and 44 said ignition coil....we are getting knock counts of 40 ..I have the log saved, but dont know how to upload it if someone would take a look at it. We just put in new plugs and wires, and the plugs look fowled already, maybe they arnt, I will get pics of them tomorrow ( I would have to email them to yah) the only other thing on the car is an MBC that is still at 10lbs of boost ( spring is to small) and the aircan is untouched, that is all that is done. PLEASE we need help bad, anything that MIGHT fix this problem is fine, aslo in my tt stealth I can feel when knock hits and hear it, I dont in this car, but I am not use to it so thats why maybe, also the knock decreased if you get on it from a stop and is almost gone when you reach the end of the gears and pops up someitmes if just crusing