Quote:
Originally Posted by Dean
I have seen a number of maps where tuners rather than taking the time to fix the intake map, just mess with the A/F tables for the WB reading they are looking for...
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Well, if that is what is done, then some weird things can happen with fueling and timing too. I do not like that method of tuning - it's a shortcut, but sometimes it just needs to be done that way. Methanol/water injection on the stock ECU is an example where you might *have* to do this. I avoid it at all costs.
So yes, if the A/F targets are tweaked to get the wideband readings right instead of properly adjusting the MAF table (aka intake map), then there could be some altitude issues with fueling. I do not know that for sure, but it is definitely possible.
In my experience, it is boost that is usually the issue though. Even with a good manual boost controller.
This discussion is way too technical - haha...