Thought I'd post an update since I haven't posted in awhile.I've now put on over 350 miles. I fueled up last night (first time since the speedometer worked) and I got 22MPG (city/country). Not bad since I'm not exactly taking it easy on it . With the S5 tank being 18.5 Gallons I can go a long way between fill ups. I like that. On the same roads and driving a little less agressively my rx-7 got 18MPG. Better fuel economy, better reliablity more horse power. This is a win win.I think I found which sensor was giving me troubles. It could be the wire or the sensor. For now I have it unplugged and the car runs fine without it but retards the timing 2 degrees. I'll get a new sensor and see if I can get it to work right.I've installed my stereo (previously used on my '86) which includes a 10" subwoofer located in the spare tire. It is nice to have music again.Stuff still to do:Hook up the powersteering, new rear struts. Maybe rebuild the brakes. Hook up the heater hoses. Figure out why the blower quit working. Lots of trim and misc issues.

Well I have the alternator hooked up now. It is nice to not have to conserve power while driving. I even bothered to put the stereo head unit in.I got the speedometer to work. I mounted a reed switch to the rear diff and glued 4 magnets on the heads of the bolts that connect to one of the axle shafts (to trigger the reed switch). I connected the reed switch to a dakota digital signal converter and then to the speedometer. Works great. It is so nice to have a speedometer. It's almost like driving a regular car now I did drive it to work all last week. I even let my wife drive it It is hard to start at times. I think one of my sensors is bad or a wire has a bad connection...somewhere...guess that is my next thing to tackle.