First thing that springs to mind is that you perhaps put the oil filter in the wrong way round. It's been done before, more than once! The side of the filter with the orifice and black rubber sealing ring goes against the engine.
That doesn't add up to why the fuel pump keeps running though. Is it still showing this symptom now in the quiet of your garage?
That doesn't add up to why the fuel pump keeps running though. Is it still showing this symptom now in the quiet of your garage?