I had the similar problem some time ago and Dave Swingle help me locate the problem (Thanks Dave). It was the ECU - the big one behind the driver's seat. Dave swaped in his good working one and the problem disappeared. I replaced mine with a rebuilt unit from Grady. If you can find someone with a good ECU, swap it in and see if that's the problem. Bill K [Non-text portions of this message have been removed]