philip1

Hi, if you are going to purchase a new Maf sensor make sure it an original one, I bought a cheap ebay one and it gave me more problems, the misfire could be the spark plugs if they haven't been changed recently, unfortunately the sensors can go bad easily with the TT, I had the red oil light on my dash, I changed the oil pump and pick-up pipe and it didn't fix it, I then bought a oil pressure sensor, it solved the problem, the sensor was only £15, the TT likes to test us 🤣

Hi, the sensors do fail alot on the MK1 TT because of the age of the car, I had to replace my oil pressure sensor last week, I would start with replacing the sensors, they don't normally cause issues with the turbo, it's best to change them anyway, they are not expensive, I would then look at the n75, the pipes are notorious for splitting or even collapsing, I replaced mine with silicone ones, check the PVC valve and the big pipe coming off the turbo