ALright WE have the exhaust in and the #1 O2 sensor has been moved to after the flex and before the cat on the downpipe, and the second one is in, we then reset the computer and took it for a ride, IT pulled ok through first and then in second somewhere around 5500RPM we got fuel cut, felt like the rev limiter, then after that it cuts down at
2500 RPM feels like it is hitting the rev limiter. EGR system is completely removed The only thing that is left is the Sensor that all of the EGR Vacumn lines goes too, there are three nipples on that sensor, one on the bottom that goes to the throttle body right before the butterfly, then there are two nipples on top, the top nipple is not attached to anything, normally it is attached to the BPT, the second one to the top of the sensor is attached where it normally goes on the intake hose, after the MAF and before the Throttle body. What the heck is going on. why is it cutting at 2500RPM other than because the ECU is cutting fuel. why is the ECU cutting fuel, Is it because the O2 Sensor has been moved so far down stream? or does it have something to do with the EGR system and the Charcoal cannister that is not hooked up, or does it have something to do with the EGR vacumn sensor? Please help???????

2500rpm is the engine safety measure when you MAF sensor is seeing signals out of range... I could require a re-think of your setup...
check your air:fuel ratios to be sure.