mark03expeditio
Member
I'm new here. I have an 03 Expedition XLt 4.6 with 174k. It kept running rough and had no power. I checked the codes. I had a misfire on #4, 5 & 6. I changed all the plugs and boots for the coils. I started it, and the misfire codes went away. Now it idles rough. Still has no power. I checked the fuel pressure. None. The relay clicks on when you turn the ignition on. The fuel pump shuts on. Then a couple seconds later the relay clicks off and the pump quits. The engine keeps running. WITHOUT THE FUEL PUMP. I am assuming the relay is good since the fuel pump kicks on. I changed the fuel pump and filter. Nada. Still no fuel pressure. I have no codes. Help!!
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