KR could be the culprit do you have access to HP Tuners or willing to pay a shop for a tune/retune? I had to lower the knock sensors sensitivity on my truck to get rid of false knock. I lowered the timing and boosted the octane and the KR didn't change. False knock shows up as a little random spike in the VCM Scanner. Real knock looks like a stair step across the scanner usually under sudden throttle or a heavy load. Buying HP Tuners was one of the best things I've done for my build. I'm not a tuner but I've learned enough to keep my junk running strong

You can see the stair step red line... this is real knock which can do damage.

 

Oh thats very cool. I was thinking of getting an hp tunners when I get to putting a cam, heads intake. Injectors and fuel pump. .. how much was the hp tunners?

 

HPTuners is $400 I believe

 

Plus a wideband gauge and two HP Tuner credits... but once you're setup you can flash different calibrations... like... forever... unless the PCM fails... then you'll hit the junkyard for a PCM... buy more credits... and tune tune tune away!

That said my AEM wideband o2 sensor died Saturday...
I miss seeing my A/F ratio... a new Bosch 4.9 replacement o2 sensor is $76

 

Call AEM, they may be able to hook you up with a replacement. I heard about a bad batch of sensors that died prematurely.

 

Mine is three years old. If the new sensor lasts three years I'll be super happy.

They just don't last long like narrowband's do. The SE X pipes bung is at the correct angle to help keep moisture away. I've read if you turn on the key and let the sensor preheat before starting it helps with longevity. Turning on the key you can see the word "HEAT" and LED's climb clockwise red to green on the gauge as the sensor preheats.

 

Hmm I’ll start doing that. Normally I don’t start the truck until all the dinging stops at the minimum

 

Mines been taking longer to heat up then before, I wonder if it’s on its way out, I think it’s 2 y/o now.