3.0 Intake Manifold Removal & Knock Sensor Replacement

I got a new engine installed last summer and immediately came up with a
dreaded code 52. Long story short, it was more trouble than it was
worth to get the guy who did the engine to do anything about it. after
putting up with poor performance and bad mileage for a while, I decided
to take care of it. a shop had quoted me like $600 to do the work and I
wasn't about to pay that, so I set