hi everybody, so ive gotta drive halfway across canada for work in two days and my truck isnt running well. The prob is that it boggs under load, like if i shift it into a higher gear while at a somewhat normal to low rpm it will bogg and sputter until it reaches like 4000rpm at which it runs good. So it only works well at high rpm, i thought it might need a new cat but i got that checked out and its not the prob, i also threw in a new fuel filter and new spark plug wires and neither fixed the prob, can somebody help me before i take this road trip, ne input is greatly appreciated thanks