Before the old pump failed, was someone messing with the fuel mixture?

Replacing the pump (AND FILTER) on my 190E totally changed the behavior of the car. I had to lean it down a good bit.

Maybe your fuel pressure regulator is not doing its thing?

You are SURE that you have spark?

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My first Mercedes Benz. 4/6/07.

1984 190E (201 024) 2.3L four.