tmmt1234

I had a po325 knock sensor code go off in my 2001 ls430. I had the typical loss of power. So I went and bought two new knock sensors and changed them out. Put it all back together and ran the car for about 40 mins and the code came back on... I am now lost. I have always ran premium fuel for years and have no clue where to look next. The wires and harness looked just fine. Anybody know anything?