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2017 Ford Fusion Sport
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On my accessport I was curious to know what ignition correction max is? I assumed it would show me the min and max corrections without me needing to use up 4 guages monitoring 1-4. Well it showed 10+ going up a hill at like 40 in 2-3rd and that seemed weird to me. Is that fine?
 

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positive ignitions are a good thing, well safe anyway, its an indication your tune is very conservative if they are as high as +10.

Negative ignitions are a result of the engine knocking or the fuel detonating early because of excess heat or too much ignition timing, aka too aggressive of a tune for the fuel you are using. There isn't really an agreed upon value for safe negative ignition corrections, staying at 0 or slightly positive is best but going slightly negative such as -1.5 is perfectly fine. Your octane adjust ratio will also adjust the tune continuously to keep it safer.
 

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Theirs people out here getting up to - 3 corrections. I'd say use the best fuel you can. You can try one day a gallon of the godly e85 and see how that works with making your corrections less negative. Also colder plugs could help too. The octane adjustment ratio usually saves you from it. Data log a pull or a few pulls or even a race Haha. Just to see if the negative corrections are consently through out the pull or race. I know that if you slam on the Gas or hit a mean bump on a crappy road can make false negative corrections appear.
 
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