BackInBlack90LX

i replaced it, and have replaced fuel pumps before but now when you first turn the key, koeo on my stock lx hatch it is super quiet not when it winds up probly the quietest ive ever heard on any mustang is that normal or defective pump?

uedlose

If the car runs good and starts well no problems no worries.

mjr46

some fuel pumps are quiet..feel lucky you have a quiet one..most don't

FoxGT

Generally a stock size pump that's loud means it's worn. So quiet it better if it's a stock replacement. Some fuel pumps have a foam sleeve that comes with them to wrap around the pump to reduce noise even more.