Car sputtering a little

A little history first. I put in a fuel pressure regulator and 24 pound injectors a few months back. Set everyting up and it ran pretty well on the stock fuel pump. So the other day my car was leaking gas and the grommet was totally leaking so while I had the tank down i swapped out the old fuel pump which was a walbro stock replacement for another walbro 190lph that I had bought last summer that I've been too lazy to put in unitl now. So the car drive a little choppy and I don't have access to fuel pressure guage and I have to go to work in about 3 hours. I don't want to put to much gas in the car because I don't want to have to lower the tank again with several gallons of gas in the car. Could it just be running lean because it doesn't smell like it's runnig rich. Thanks for the help.
Stu:shrug:
 
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More info on what it is doing exactly please. Using one's sniffer can be misleading when it comes to determining rich or lean.

Good luck.