Here's the latest.

I've read the various replies as well as some of the pages on
Vanagain, van-cafe, etc.

I've dumped the oil and replaced it with Castrol GTX 20-50, took out
the pressure relief valve and cleaned it and stretched the spring
slightly. Started it up....and the buzzer went off at 2700 rpm.

Next I took disconnected the wire from the high pressure sending
unit, started it up....and the buzzer went off...

Took the wire and grounded it to the engine block.....and the buzzer
went off....

Suggestions now???

Thanks.

Ric