Okay so setting the duty cycle back to 70 seemed to fix my stumble. Now to find out why I need to have it so rich. Any ideas, I am going to start with the O2 sensor, unless anyone thinks I should try elsewhere.
m

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Martin Ingram
Colorado Springs
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)