1990 5.7 TBI. So I just picked up an MT2500 scanner and have been playing around with it. I notice that the knock sensor is going off whenever I accelerate (even with mild throttle). Is this normal? Engine runs smooth, no CEL, no modifications from OEM. I'm guessing this is the way its supposed to work by retarding the spark in real time, but didnt think it would be happening that often. Thanks in advance.