So I've been trying to diagnose a source of knock for my S2 3800 N/A. In my efforts to find the source of this knock, I have noticed something that I think is unusual.
With the histograms, and watching the knock counter, my knock counter runs constantly. It counts up at roughly 4 counts per second.
What I find even more unusual is is that this counter continues to tick upward at the same rate with the key on, engine off.
I've unplugged the knock sensors at the PCM, and it still continues to count.
I confess that I do not have a perfect understanding(not even remotely) of how the knock sensor counting comes to play, but given that I've pulled the pins for the knock sensors at the pcm plug, and it continues to count upward, would this indicate that I have a faulty PCM?
Any thoughts, suggestions, or input is welcome.
Thanks,
Doug