Misfire at High RPMs

[MDeJ10]

My MSP runs fine till it gets a little over 2500 rpms then it starts to misfire causing the car to hesitate but only under load. I've replaced the coils wires plugs put fuel injector cleaner in and an oil additive to try and fix it but to no evail. The engine light came on and when I scanned it the knock sensor code came up. Any other suggestions other than the knock sensor and those listed because I dont want to buy the sensor and have that not be it.

 

[Apex87]

It's most likely not the knock sensor. Its only throwing that DTC because of the agitation (Sp) from the misfire. My best guess without looking at the car would be a boost leak. Sometimes with a slight boost leak, the car will fall on its face only under a heavy load. Another area to look at is the fuel system. Id look at the fuel pressure, if the pump cant keep up it'll feel as if theres a cut out. I'd put my money on the boost leak though.

 

[MDeJ10]

thank you for taking the time to respond i have to continue troubleshooting and looking for answers