Too much water coming out of jets??

[Jay]

So I just bought a house that had a 18’ circular above ground pool with a Hayward ec40 pump/filter. I hooked it up and put 4lbs of earth but it is shooting water pretty hard out of the jet. If I close the flap to the bug trap, it will pump “normally” for a little while. No clue what it’s supposed to be like though. Any help would be very appreciated, thank you!

[Teapot]

What's the pressure gauge reading? Did this alter whilst the grids were pre coated? It is quite a powerful unit and with only a single return I would expect it to be strong. Not that is needed for good filtration or the electricity bill.