Help troubleshooting

[GhostDriver]

My KA has been acting a bit funny for a while and I'm now compelled to do something about it. When I accelerate from 750 to around 3-3200RPM(daily driving) it feels like I have a non-responsive flat spot around 1500-3000RPM and once I get to 3K it pulls regularly. I thought it could be the CTS but I read one of DJs posts and he mentioned something about pulling regularly after around 5K so I ruled that out plus my rad hose was bad I my water-temp gauge read it so I guess it can't the CTS. The only thing I think it can be is my timing because I advanced it a while ago. I'm going to ask my pops if I can use his Snap-On MODIS to see what my timing is like and what sensors are triggering. The only modifications I've done to my engine is remove the AIV, gut my airbox, Z32 fuel filter and play with the timing a bit. I cleaned my MAF a while ago when my throttle was sticking. I'm pretty sure I farked my timing so I guess the ECU might be retarding the spark I just wanted someone elses opinion.

Thanks