I have noticed in my 96 LC that it knocks just a bit (maybe for about 1/4 second or so??) as it starts out from a standing start, of it I accelerate at just the right pace from a low speed of say under 10 mph.  oes anyone think this is just a case of buying gas that is too low in octane, or do I need to replace the knock sensors or oxygen sensor or what?? Anyone else seen this? If you accelerate hard enough, its not noticeable because the engine moves quickly through the "knock region", but if you want to , you can cause it to knock longer by controlling the accelerator at the right level.