Quote:
Originally Posted by Tor
You mean instead fix it in open loop fueling so that AFR becomes correct and AFR_Command has the tops and valleys instead?
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Yes, in open loop you don't need commanded and actual AFR to match.
Quote:
Originally Posted by Wayno
It doesn't necessarily mean it's running rich, just that there's more fuel blowing by the valves and past the O2 sensor, so may actually be lean. It's not even below 11.5. Unless making it leaner produces actual measurable power, leave it as is.
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Reverse that logic
Unburnt fuel isn't measured by the sensor, so it can't read richer than the burnt mixture. It can read leaner than the total fuel injected, but not the other way around. A more stable AFR is ideal, you want it to gradually richen up. For the sake of a quick tweak to the fuel map, it's an easy fix. Helps with EGTs etc, the timing curve I'd imagine is smooth so you don't want it too rich when the timing advance is less. You want them to almost be the reverse of each other.