I have brought my "97 Ford Taurus into mechanics here and asked them to check why the speedometer keeps going from 100km down to "0" and stays there and today the RPM was up to 3 and the engine was reving and not driving properly. Also steering wheel feels like non powered (older models without power steering) and my mechanic is stumped. They tested all the electrical and it was showing fine for voltage so this is not the problem. They changed oil and the car has not been driven hard ,has almost a full tank so not the head gasket I wouldn't think. I have no clue why it is doing this though. For months the speedometer kept going from "100/120km" down to "0" then back to "100"" then down to "0" then fine for weeks at a time then does it again and then fine. Today was the first time the engine sounded this way and I could barely getter home from the mall. Tried using lower drive gear to see if the RPMs would come down but, to no avail. I am hoping someone there can answer this. I know the car is older, but low mileage and was in Red Deer owned by an older couple so in fantastic shape really with no rust even(no salt used out there) so it is really a quandry as to why it is doing this when the electrical showed all was fine and a tune up and all done only a few weeks ago,so I am baffled and bewildered. Anyone pls if you can answer this I would appreciate it. Thanks Lorri Speiran