I understand dave.
I think it may be due to vacuum loss caused by not enough combustion due to the fuel delivery problem. Wish I knew for sure, it's a frustraiting mess... but it gives me a hobby to pursue.

Thanks for the tip ande......

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html