[SSRS2010]

Originally Posted by wh0rsep0wer

The adaptive corrections SHOULD occur. But in a large number of the L99's, it hasn't been occurring. I agree that pulling the fuses is kind of a "hack" but the only way to truly correct it is through a ECU update from GM which we have no control over. Pulling the fuse and getting it to work with minimal effort essentially takes the ECU to factory defaults...I don't see a problem with that, especially since you won't have to do it again as long as you keep premium gas in the tank.



There ARE two tables (See screenshots below). There is spark derating that occurs in real time to correct for knock in certain cells WITHOUT the ECU giving up and going directly to the low octane table...This is known as knock retard - and is an "adaptive" set of values...but if it sees TOO much knock from the knock sensors it reverts to the low octane table.

Think of the high octane and low octane tables as a coarse adjustment to "get it in the ballpark" and the knock retard as a fine tuning adjustment...

These screenshots are from a 2002 Z28 factory default configuration...1st screenshot is the Spark Advance Menu, 2nd screenshot is the High Octane Table, and 3rd screenshot is the Low Octane Table. Notice the BIG differences between the two tables occur at WOT (the values at the bottom of each screenshot) THAT IS WHY THIS WORKS!!!

THANKS THATS HOW WE LOOK AT IT.GREAT JOB ON IT.