i have a 93' Si H23, and it is throwing a bad knock sensor code. the car is also spuddering occasionally on start ups. typically after i crank it up its fine but, when i turn it off to get gas or something is when it will sputter. and it doesn't do it all the time either. i replaced the fuel pump,strainer,filter but that didn't solve it. so the question is, could the bad sensor cause this? And if not whats left to fix?