I've recently bought a 200BHP Audi A3. It's a 2001 model, and has a full milltek race exhaust system, K&N air filter, Re-circ valve and a custom remap. Dyno print out is 199.1 BHP. My problem is the starting of the car. First thing in morning it is a pain to start and stalls out. Soon as the car is warm it starts first turn of the key. The rest of the day can be problomatic but nothing like when it is first started in the morning. My question is, would it be a faulty MAF or could the fuel affect this? I was advised to put in high octane (and instantly forgot), I topped up a tenner 95 ron, but the next day I chucked half tank of BP ultimate 97 ron. So I am yet to start it in the morning and see if it makes a difference, but this afternoon it started first time. Is it possible I am getting cold start problems with a lower onctane fuel, or does this sound more MAF related? The car is in awesome condition, the previous owner has REALLY looked after it and I intend to do the same. So if it is a MAF I'll go get one and pop it in. This is the 2nd A3 I've owned so I am familiar with most of it.