Car starts up fine but,if I try to rev it she starts to run rough,let off the gas and it idles fine also when I'm driving it's way down on power,could it be a clogged cat,EGR valve maybe a fuel filter.Any idea guys what it could be?I've checked my spark plugs,plug wires they are all fine.The injectors are spraying nice.I'm going to check a few more things tomorrow,if you guys got any idea what else to check let me know thanks.