CHRISCARGUY

Lately my 08 SS manual trans is a dog. Trifecta tuned 3-4 years ago. At WOT, I would show around 24ish psi and I could break traction at 40mph. Suddenly, it feels like no boost even though my gauge is still showing 24 psi. I will note that I have a stage 3 KY clutch that I don't feel is slipping because the revs are consistent with my speed. It feels like I have no boost even though the gauge shows a ton. I have a ZZP intercooler w/ their hot and cold charge pipes, original bar sensors and connectors. Where does the boost gauge gets its reading in the line of plumbing? I would think if I'm reading boost that high, that there would be no boost leak, but....
I do have an inconsistent code P0332, knock sensor #2 and am hoping to change that out this weekend. But even that code comes and goes.

Oldblue

Check the electrical connections first, per

https://www.obd-codes.com/p0332

the knock sensor could be loose in it mounting .
the harness connections could be loose or dirty.
just installing a new one , might not cure the problem.

donbrew

P0332 is KS #2 low voltage. That means it is not producing consistent AC on circuit #2. There are 2 KS.

I can't figure out which one is #1 and #2. They are identified on the diagrams as front and rear (front is where the serpentine belt is).

This is obviously your performance problem since the ECM adjusts the spark timing based on data from the KS. The fault only lights the CEL after the second occurrence.

OMG! The list of possibilities includes a broken ECM! Maybe that should be the first thing to replace. [sarcasm]

Cat Man HHR

For those who are following along the acronym KS stands for Knock Sensor.
I hate acronyms.
But I do like SNAFU.

Oldblue

CHRISCARGUY

Thanks everyone. I have a new KS ready to install. They are only $26 so if I need to dick around with it, may as well replace it. Now the question is, which one is front and back?

Cat Man HHR

I'm going to say the one closest to the belt and alternator. that's the front of the engine.

donbrew

I guess post #3 was a waste.

RJ_RS_SS_350

Strange, all the drawings I'm finding only show 1, down low next to the crank position sensor and oil pressure sensor/switch. The part description says 2 are required, but the drawing only shows the one. I can't get the image to upload. GM p/n 12621820 ACDelco #213-4583
#135 here
https://www.wholesalegmpartsonline.c...ssembly=366256

I need a new site for these drawings, this one has become very difficult.

Cat Man HHR

Well it looks like yours was overlooked.
I've posted things myself that are overlooked too, it does get frustrating at times.