i just got a scanner recently (Scan Gauge ii) and i put in the gm specific knock code and it reads 0.0 at all times except for 2 times. i have it on update fast, and it blinked to .8 then to 1.5 kr then the next day i got it to .7 then next blink to 1.7 then back down during WOT runs. is this possible? this is on a warm stock supercharged engine in winter. could it actually be that low or just bad knock sensors or bad gauge or gauge code? thoughts?
thanks in advance