I have just put a used engine in my 95 wrx and removed the power Fc that was running my old engine and put the standard ECU back.

The people who fitted it also put a 255 fuel pump and denso plugs in. Do I need to put a standard fuel pump back in or will the ECU sort it. Is there gonna be any other problems with this.

 

You don't need a modified ECU map for an uprated fuel pump, and plugs should be fine as long as they're the standard heat-rating.

 

It shouldnt be a problem.

 

It wont be a problem if your running standard injectors/fuel pressure regulator.

 

Thanks guys.
I thought this much but just wanted to make sure.