Driving along, truck just died. No fuel at injectors. I replaced the: fuel pump, fuel sending unit, filter, fuel pump relay, MAS sensor. I shot compressed air through the fuel line from the pump to the filter. Still will not start, no fuel. Starts with starting fluid. I am getting 8.48 volts at the white striped tan wire going to the fuel pump. Is this enough voltage ? If not, Can I send 12 volts directly from he battery? If it requires 12 volts any ideas why voltage is low with new relay and pump?