Hi i have an 03 4.6l expedition about 110,000 on it . i had the cel light on and got p0174 and p0306, i put in e3 plugs and new cops , 2 O2 senors after cat ran better for a day ,air and fuel filter about a year ago , i check for leaks and wiring nothing , after i did the O2 senors the p0174 went away , so its do this rough idle real bad hole truck shakes , drive down the street floor it and only get up to about 10 or 15 mph , i check the display inside giving me a code 9204 fuel sending unit short to ground i think , im waiting for the cel to come back on to have it checked again , not sure if its the egr or iacv or if it would have that much of an effect on the truck , any help would be appreciated,
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