John: thanks for your reply. I do have an m103 engine. Like you, I am leaning towards the replacing the CPS (the one that goes from EZL to the flywheel towards the rear) as a starting point, then go from there. My rationale is start from the oldest part first, since my cap, rotor, wire, plugs, and fuel filter have been replaced less then 40K ago. If the CPS change doesn't solve it, I'll see about the fuel pump stuff. Thanks for your suggestions.

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ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)