The fuel pump has high voltage going to it,did not check with a meter but ran a test & that is what it said. I replaced the fuel pump and filter two weeks ago,checked the relay it was good.I just dont know. I try to prime the system by turning the switch several times, I get a code (P0455) .It ran for a week after changing the pump,then the check engine light came on, I ran the test ,high voltage.Now it wont start, it trys to but just wont. any help would be appreciated

The code po445 means there is a leak in the evap system, a bad gas cap maybe, but that wouldn't cause the vehicle not to start, this sounds to be more of a ignition problem than fuel, next is to find out if its firing a good spark and also need to check the injectors,on some vehicles if the timing gets off a little it would cause a similar problem.