Clifford640

Hey if you can help please do.
I have a 99 Gt and it wont start and is a daily driver. I pressed the valve on the fuel rail and very little fuel came out. I replace the filter and use an additive regularly, the fuse is good and the switch in the trunk is down but I dont hear the pump when I turn the key. previous to not starting it didnt want to start on the first try but would on the second, once running it would run fine. It has started once ran poorly tried to give it gas and it bogged and died. I have read it could be the CCRM(where is it) or IAC valve(where is that) and how can I test them? Im leaning toward the fuel pump but realize it can be other things. please help!