Hello,
So with the car idling, the timing is where it should be. Once I start driving (part throttle) spark goes down to zero and once I let off the throttle at speed the timing goes back to where is should on the timing table. Any help will be awesome been chasing this issue for 3 years now...
I would like to know why you set the entire low octane timing table to zero degrees. That is a completely wrong thing to do.
Copy the high octane into the low octane table and then remove like 4 degrees from the entire low octane table.
Then zero out all the negative numbers in the ECT spark correction table, it's removing a ton of timing while the engine is cooler and exactly in spots where it would be accelerating from a stop.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
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