After my fuel pump failing( thankfully my engine paranoia saved the day). I am Having my fuel pump changed from a 255lph to a 340lph. Will the car need remapping.? I have already decided to have it checked for piece of mind so this is just a general what if question about going to a higher flow pump

 

Not essential , but you should find a little bit more hp when you do.

 

I would absolutely get it checked asap and i'd be surprised if a remap isnt required.

AFAIK the ECU only monitors fuel pressure and so with a pump throwing what could be 33% more fuel at the same pressure then you're running much much richer.

 

Getting it checked anyway as I think the fuel pump was weak last time it was mapped 5 weeks ago