Why won't my car accelerate past 3500 RPM?

Ok my car has been having issues with driving. When I accelerate it will get to about 4k rpm then make like a jerking and then a pop and then my car goes into limp mode and won't let met go past 3500 rpm's. The check engine light is on and it is the OBD code p0336 from autozone and said it's the ckp sensor. So I replaced it. Didn't fix the issue still same problem. To make a long story short, I ended up replacing the crank shaft position sensor 4 times and it still does this jerking and no power upon acceleration and jerking. I did some research online and it said to check a lot of things for p0336 and everything was good. The reluctors were good not damaged or no broken teeth, so it narrowed it down to the crank shaft position sensor connector and wire to check for broken connector or frayed or cracked wires, I checked all that and it was good so I'm now lost on what it is! So I noticed a connector that's connected in a three way connection with the camshaft sensor and the crankshaft position sensor and the third connection being the knock sensor. So I messed around by moving the wire around back and forth to the knock sensor and then drove my car and the problem went away for about a week but then came back a hundered times worse. So my question is can a bad knock sensor cause this jerking and false code of p0336 and not being able to get rpm's past 3500 and with no power and the jerking? Help