Thanks everyone, didn't have computer access this weekend.

So we are talking about the reference sensor at the rear of the engine, OK, that helps (the more expensive one of course).

When the car dies at speed (does it at idle sometimes too), the tach definitely show the engine RPM - half the time I can coast and feather the accelerator and it will 'catch' and off we go, the RPM's fall with speed obviously. If I put it in neutral at speed, the tach will fall to zero of course.

I replaced all fuel system components last year, and have not checked the fuel relay, but I think I can rule it out because when the previous relay was failing, it was a very different type of 'engine dying' - removing the fuel made was a much more dramatic 'dying' than what I'm seeing now, basically right now the it just 'loses power' in kind of a smooth way if you know what I mean.

I've got the famous oil leak at the rear of the head, it comes and goes, usually only comes on long trips, which we don't use the car for anymore. I will crawl under there this evening to see if the sensor is all oily.

Tech Forum searches indicate either the ignition module, coil, or maybe the temperature sensor may be a problem. The coil does not feel hot after the drive to work (if that's worth anything diagnostically), and the ignition module is portrayed as a "it either works or it doesn't" type of failure.

Please keep the feedback coming.

THANKS

Brian