[PorscheBMW]

I had the same problem, after i replaced $600 worth of parts someone on this form said to try the engine speed sensor (known by many names, engine reference, camshaft position, crankshaft position, engine posion...etc) its a 75-85 dollar part and I'm very certain thats what it is. i know that it doesn't act funny upon startup but when it started doing that it didn't acct up till about 5500 rpm then got worse. last tI'me i had to replace it the damn thing wouldn't even start, and I'm pretty sure that its the reason I'm on here today and need to replace it a 3tI'me in 3 years. now the whole engine cuts out and back on if i give it anymore gas than what the clutch requires. give it a shot. if my car was doing what your daughters car is doing, i wouldn't have hesitated to buy a new. thats the truth, i wouldn't give any better advice to my own kids.