High resistance in CKT 496...maybe? Lots of voltage drop when the knock sensor is connected?
No, I don't think so. It's supposed to be that way with the 5v being supplied by pcm then gets dropped to around 2.5v once knock sensor is connected because of it's resistance.
Are you measuring voltage at the knock sensor end, or at the computer end of the wire? Instructions say to measure it at the computer end.
Computer end
What did you use for sealer on the knock sensor?
Nothing. The new delco sensor looked like it had some on the threads already..like the pic
Was the hole in the block rusty? Did you clean the rust out of the threads?
Probably. I didn't clean it out..
I was thinking that too. I watched a youtube video to get an idea of any difficulties and it failed to mention there would be antifreeze pissing out so, I was in a fight trying to get the new one threaded and contain the antifreeze as fast as I could. Really should have cleaned the hole.
You don't think that because I had to crank down on it so much to get it to ground that it wouldn't register a knock? Kinda hard to get at the sensor so I'd say I gave it some light taps as well as hitting the intake and block a little harder where I could. Not too hard but enough to make me nervous
Maybe scanner isn't picking knocks up? But it seems to work on everything else. Guess I could watch the timing and see if it retards? Just to be sure. Even though I'd thought there would be some kind of rpm change or something able to be heard..