Ok guys I have a 97 f250 7.3 with 143k fairly stock. I changed my fuel filter the other day. Now I’m running 2500rpm at 60mph where I use to run 60 at 2000rpm motor doesn’t sound strained. But does seem to lack power on low end. If I run 70 it’s almost up to 3000 rpm. What have I messed up here. I am running a wix fuel filter should I go back to motorcraft. Please help.