ferm, I need help

[spareparts]

Ferm, My Cherokee is giving me a fit. Some one sugered my tank last week, i drove it home before i noticed the suger around the neck. i pulled the tank, cleaned it out, replaced teh fuel pump, fuel pump screen, and the fuel fiter(ended up doing it three times, ran great in short distances, changed teh fuel filter again and it did better. i tried to drive up to NC today, only got as far as Myrtel Beach, my jeep was acting like it was starving for fuel. I made it back to George Town, found an Auto Zone, check the codes, 171 and 172, too rich, too lean. I put together a make shift fuel pressure guage and drove it down the road, fuel presure stayed up whgh, then droped fast, Its definately a fuel delivery issue. I pulled one injector and checked the sceen, nothing I could see in it. I'm thinking I got a bad fuel pump, thinking about checking the harness plug for voltage drop. Any ideas? I allready tried running it with the fuel cap off. Anyhting I was missing about installing the fuel pump?