Hi guys, got a seat 2019. Had a knock on front passenger side when i got the car. Replaced wheel hub and suspension leg inc wishbone. Now got this noise coming from under the car. This noise only happens when i put my foot to the floor on the gas pedal. If i drive like a granny it’s fine, but when i put my foot down i get this noise (sounds like a moped). I had the MOT done today and ask the MOT guy and he had a test drive and said he can’t tell what it could be. No hole in exhaust and no gas escaping that he could see from manifold or exhaust. Nothing obvious. Checked exhaust cover and everything else. Anyone any ideas? I put the car on axle stands and drove the car but couldn’t hear the noise. Only seemed to hear it when wheels are on the ground and i’m driving it with my foot down. Can’t hear it if i just rev the car in neutral.