Twingo D7F läuft nach Einspritzdüsentausch viel zu fett

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So status quo with old injectors and everything is fine?
Hard to believe!

So after having the old injectors swapped back in, the car runs somewhat fine, but it's leagues better than with the "new' injectors. The workshop is willing to cover the costs of new and correct injectors that are actually meant for my car, so I'll see how that goes.