Yesterday I installed a new Delphi fuel pump from Napa in my 2000 grand prix. It is a little noisier than the old one, is this normal? The car runs fine, a lot smoother and does not stall out anymore as it did with the old pump. It did, however, pull code P1133, which I think has to do with an o2 sensor. I cleared the code and drove 20 more miles and the code did not come back.
Any thoughts? should i be concerned about the noisier than I'm used to new fuel pump? will it quiet down as it breaks in or gets older?
BTW, it was a pain in the rump to seat it down long enough to snap the ring in place, but I have read that this is normal.