I didn't see the OVP relay on the list, but I assume you have changed that too. Otherwise, old versions can perform poorly with age, even if the fuse on top is still solid.

Also, the symptoms sound like there is still fuel pressure loss. How did the EHA replacement go? I have heard of air leaking in through a bad EHA gasket.

Cheers, Andrew Seidel.

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89 190E 2.6
83 300TD Turbo
75 240D