Okay - I know nothing about cars except that I love to drive, so each time I go in to have maintenance done, I worry that I’m being taken advantage of, being a woman and all. So - last year I took my 2003 Audi TT to an independent car repair shop. She was running great but needed an oil change. The people were very nice and after a few hours called to tell me my car was ready and all it needed was the oil change. I drove it off their lot and right away, she started to stall, back fired and blew black smoke - the fuel wasn’t getting to the engine. What the heck? She was running fine when I brought her in so what happened? They put her back on the computer and told that nothing was ‘shouting’ at them - so I left the car. Two days later she was ready again - to the tune of almost $1000. They told me 'the air mass meter and load were reading way too high…and found fuel pressure about 5 PSI too high under all conditions. There was more oil present in intake tube than normal…and they found the spark plugs fouled from poor running condition". So they replaced the spark plugs, the “crankcase vent valve at air inlet for turbo as it is allowing too much oil through”. Now - it’s time for her yearly maintenance again and I’m afraid to take her to the same shop, for fear that they were less than honest. But here’s my quandary - maybe it was just a coincidence, but why, then, was she running great prior to dropping her off and then BOOM! She basically fell apart? These are nice people and I don’t want to judge them unfairly but until now didn’t know where to turn with my concerns. She has 35,000 miles and I’ve had since she was new.