I've been having this weird issue. As i'm driving down the road at constant load, rpm, tp, etc. All of the sudden i'll drop from lets say 29* to 16* instantly and then right back up to 29*. when it brings the spark advance up at that rate it causes knock retard of like 3-5*. what gets me is that there is no load or tp change or anything else. Where should i look in my tune to figure this out? i do have a log for an example, please forgive the few extra pids i have selected i keep forgetting to remove them from the bbl settings. the advance goes from 28.5* at frame 340 and 16* at frame 341. it knocks when it brings advance up from 16*