After Warming up and trying to rev past 2000 it slows down massively and starts backfiring/burbling past 3000 and won't rev past 4k, I checked for vacuum leaks and will recheck with starting fluid, I haven't checked the tps yet, but any other possible causes would be helpful

 

could be something like a fuel filter too

 

I checked my fuel feed line when cranking and it pissed fuel out, I checked for vacuum leaks and couldn't find any, I also checked tps and got resistance of 1.4k ohms rest and 1.8k ohms on full open throttle on the black and green wire. I recorded this quick video to show exactly what happens when I max the throttle out. and yea my fuel tank and water temp gauges are fucked on gauge cluster, engine was warm though

 

Do you still have the cats in the exhaust system? If so, they do get clogged up over time.

 

So I think I fixed the problem, I dumped seafoam into the time and adjusted the crank angle sensor to proper timing, that seemed to make the issue go away, car redlines in neutral and runs wells.