1994 Chrysler New Yorker My car loses acceleration sometime

Recently when I was accelerating on the free way, my car started to lose acceleration for about 10 seconds. Once I put my foot on the gas again it continued to work fine. It has also not caused this problem again but does make a sputtering sound on the front left side of my car when I go over any type of bumps. I was thinking this may be the fuel filter and am going to have that replaced tomorrow. I have recently replaced my transmission in the last six months and have had to switch out the alternater when I first got the car. Any help would be greatley appreciated so I don't end up getting taken advantage of at Jiffy Lube.