Ok, this is some wierd $#!t here. When I'm driving in low RPM's I don't seem to have a problem. As soon as I get WOT and start reaching my high RPM band (5000 or so) the engine starts to sputter a little and the Tach jumps up and down!!! I thought it might have been a bad battery connection but I replaced the battery and the terminals!! So what the hell is going on??

Could it be fuel related?? ie: Fuel Pump, injectors, or filter