hello I am out of ideas. my 97 ford ranger would not start but had head lights, radio, interior lights ect. I changed battery, starter, solenoid, battery cables. Still would not start but did have power. When giving truck gas when attempting to start it would turn over then die when releasing gas petal. I changed the fuel filter next. Now here is the odd part. once i changed fuel filter there is no power to anything! i checked fuel pump switch and seems fine. I am dumb founded. Help please! thank you