On this engine (4.6L V8) there are two knock sensors. Both are located under the intake manifold. If you look at pic 1, I circled both.
Starting with pic two, are the directions and pics related to removal and replacement of the sensors.
Starting at pic 8, I included the directions for removal and replacement of the intake manifold. It needs to be removed to access the sensors.
I hope this helps. Let me know if you have other questions.
Images (Click to enlarge)
Monday, March 22nd, 2021 AT 7:12 PM