Fuel Pump Replaced hesitation

Hi I replaced my 2001 Subaru Impreza WRX fuel pump today and now I have hesitation every so often it is not constant but it is annoying and I really need to fix it. It wasn't there before I replaced the pump. Anybody any ideas what is the problem? Thanks.

We're the pipes put on the right pipes flow and return

Remove pump assembley and re check is only answer on a forum to be honest.

Turns out it's a faulty pump. It was way louder than the old one so it sounded like it was working. I could drive the car and everything would be fine then it would hesitate and then be fine. Park up, go to start the car and it would not start.

I had the fuel pump out a few times to check everything and it looked fine. In the end I reconnected the old one and the car is back the way it was originally before I connected the new one up so has to be faulty.

The reason I was changing it was the car took a while to start but when I connected the new one it started at first turn before it started acting up.

Result good stuff