PW vs IAT compensation

Yet another compensation question. My ECU has PW vs IAT compensation table, so do I follow the same rule of either subtracting or adding 2.5% or is there a different forumla I should follow? Futhermore, should I target stoichiometric idle AFR regardless of IAT?

I'm not sure I've come across this for IAT compensation before. The problem is that if you're defining a specific pulse width to add or subtract, the percentage affect will depend on the main injector pulsewidth. I'm going to guess that this table is in relation to an OE ECU which is a little different since a MAF sensor is directly measuring the air mass and hence the air fuel ratio should remain relatively consistent regardless of IAT.

I don't tend to vary my AFR target at idle regardless of IAT. In fact in 99% of situations I will retain a consistent AFR target at all points in my map. I'm more likely to use an IAT trim to adjust ignition timing at high IAT to ensure safety.

Thanks for your comment, Andre. Only just now checked back here as I assumed I would get an email notification about any responses (didn't notice the subscribe box before).

Yes, it is pulse with modulation table vs IAT and it is not an OE ECU. It is a standalone EMU Classic ECU and I am not running a MAF sensor but a MAP sensor. Either way, I spent a good amount of time figuring out and managed to sort my AFR concerns. Funny enough, subconsciously I kept them consistent regardless of IAT.

In most instances I also maintain a consistent AFR as IAT changes. In some instances if you're finding the engine becomes more knock sensitive at higher IAT you may find that a richer AFR target can actually benefit power.

Many thanks, Andre!