My R/T won't fire. It will crank and crank, but will not start. Can spray starting fluid into the throttle body and it will fire. Replaced the fuel pump about 5 years ago and you can hear it, but we replaced it again anyway. Can also hear the new one when you turn the key on but still it will not fire. Only replaced the fuel pump from the drivers side. I have not replaced the regulator portion of the pump on the passenger side. What I have seen on YouTube is that it will cause a long cranking issue that will eventually fire. Mine will not fire. Is the next step to replace the regulator part on the passenger side?