95 Jetta III 2.0L Sputters / Won't Start
95 Jetta III 2.0L will run rough and sounds like it's miss-firing. Currently won't start (turns over and sputters). Sometimes when I try to start it, it runs fine. The next time I start it, goes back to sputtering. Got check engine light a few days ago with error codes 00515 - hall sensor short intermit, 00513 - Engine speed no signal, 00525 - O2 no sig intermit, 65535 - ecu deffective. Drove it home and the engine light did not come on. Tried replacing coil with no change. Ideas?