Well, I put the new potentiometer on the old girl this evening. Had no effect at all. I am bummed I thought I had found my problem. The eha still gives the same screwy readings as does the x11 with no flutuation at all. The only way to make the car work safely is to disconnect the eha, Idle is slightly rough but not bad and start takes about 5 secs. She then drives fine but my gas mileage is down to about 15 instead of 16. I have to find out why my circuit is screwed up and am open to any suggestions.
As a pointer with the eha connected the car stalls as soon as I accelerate warm or cold,once moving she is fine but I can not live with the stall.
What to check next for circuitry as I am convinced once that is fixed she will be happy again.
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)