I look at AFR's and BLM's as measurements. I consider AFR's more accurate then BLM's. Adjusting closed loop with AFR's is " same / same" as adjusting closed loop with BLM's. AFR's and BLM's are measurements. When closed loop AFR's are lean, add fuel to the VE Table When closed loop BLM's are lean, add fuel to the VE Table.
Course Tune / Fine Tune. Course tune is basically correcting the VE Tables. The computer bases the areas that we DON'T want AFR to be 14.7, like decel, highway cruise, and PE on an accurate Course Tuned VE Table. Fine Tune adjusts the areas that we DON'T want AFR to be 14.7, like decel, highway cruise, and PE.
dave w
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