I finally got this problem fixed ..... it was an EGR soleniod.

Problem solved ... EGR sensor

What is the brand you are talking about ?

I have another question .... if i take my cat converters off of this truck, will it still run correctly ??? I am planning on keeping the front and back sensors in place, just put new pipe in place of the converters. Mine are stoppin up and can't find any good cheaper ones to replace the OEM...

I have a 99 F-150 4x4 OFF ROAD with a 5.4 Triton that has just been rebuilt .... new pistons,rings, valves, etc. There is a problem with something, and I can not find it. I don't remember the exact code numbers, but there are 3 particular ones.... coil pack A, B, and C not firing. The last time...

I have a 99 F-150 that has just been rebuilt .... new pistons, rings, valves, etc. There is a problem with something, and I can not find it. I don't remember the exact code numbers, but there are 3 particular ones.... coil pack A, B, and C not firing. The last time I had a problem with my coil...