Hey guys! My 88 Audi 90 quattro is giving me real headaches. The car now starts sometimes but will not start after you shut it off. I've replaced many parts so far including the fuel pump & filter, fuel regulator, cold start valve,distributor,coil w/ amplifier, wires, plugs, alternator, battery& knock sensor. I was told that the problem is probably being caused by a bad crank sensor. It is showing all the signs of a bad crank sensor but it seems that an 88 10 valve NG engine doesn't have a crank sensor in it, an 88 20 valve does but an 88 10 valve does not.Now I'm completely stumped and stranded. There has got to be somebody out there who can help me. Any suggestions would be greatly appreciated. I'm losing my mind on this!!