No MAF on the Kia 3.3l. It just uses MAP sensors, so it's a speed density system.
The very first fuel injection systems were Alpha-N systems which only knew the throttle position and engine RPM. Then came MAP sensors with Speed Density algorithms. Then MAFs with Mass Air systems. MAFs became extremely common in the 90s. But, MAFs are complicated when you have multiple intake tracks (e.g. ours with two turbos each with their own intake and filter) and can be complicated with turbos because the BOV, even in recirc, means the air mass is spinning around in a circle - not going into the engine.
MAFs allow for a more "precise" tune - the ECU knows exactly how much oxygen went in - and reaction to conditions. But, MAP sensors with a sufficiently precise VE table are just as good and more forgiving of turbo complexities.
