Jerry,

You've got a CIS injection system that does have a computer to regulate it.

First thing is to get a set of gages on the FI unit and see what the pressures are.

Also check the plate on the intake and see if it moves freely.

there is an adjustment next to the plate, and there are several other possible problem points. Bad fuel distributor, warm up regulator, and the DP pressure regulator (Alzheimer's, can't think of the name) that attaches to the fuel distributor are all possible problem points.

You've also checked the obvious, like the air filter?

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles