kd99xj

I have a 99 cherokee. It started when I was trail riding and a branch flipped up and pulled a wire loose. At the time I was not sure what had happened. I was getting fire but no fuel. Pulled tank and fuel pump tested it it was pumping. As I was doing this I broke the the piece loose on the fuel regulator/filter. The the piece sticking off for the gas line. I ordered a new one replaced it but now I am still having trouble like its running out of gas if it leans. More one side than the other. I was just wondering what could cause this. Have taken the tank out several times. My friend also replaced his fuel pump and is also doin the same thing. Just wanted to see if I was doing something wrong or there is a trick to or just what you guys thought. Thanks