7.0 efi starts and idles fine. Starts to bog down and sort of backfire at 1800 RPM and higher. Gets worse under load. IF I cycle the key, on and off, it fixes the problem for about 30 seconds. So far, I have changed the fuel pump, fuel filter, TPS, Plugs and Cap/rotor. After I changed the fuel pump, it ran fine for a few uses but now is back to junky. The Check engine light is on but for the life of us we can not find an OBD connection???