But how does it measure the volume of air?
If you look inside the air flow meter of a VS, you will see thin little wire-like things going across it.
They measure the volume according to the resistance of those wires. When more air passes through them, it will cool them down, affecting their resistance.
So the temp of the air matters, eg. if the air is colder, the engine will think there is more air.... I'm just not sure about how much the air temp sensor compensates for this.
In my car I haven't connected the temp sensor so I guess it eliminates that variable.
you've missed my point. i was replying to what kaindya said, in relation to the maf and map sensors. so read it again if you must. the conclusion he came to was incorrect and i was explaining this.
if the air is cooler then its going to contain more oxygen, but its still the same volume of air, so cooler air isnt going to "trick" the maf sensor. although i do understand how you might have come about your conclusion with this, unfortunately it is not the case.
a/f ratios are controlled by the pcm's readings of the o2 sensors in closed loop, whilst in open loop the volumetic efficiency tables in the tune on the memcal are utilised.
the maf and map sensors only play a small part in governing air/fuel ratios - so in theory even if your idea of cooler air tricking the maf into thinking there was a larger volume of air passing it than there actually is, then the o2 sensors would be trimming accordingly anyway.
in any case adding a CAI will help with ecomomy, due to the increased oxygen present in cooler air - regardless whether they are map of maf equiped engines.
also in regards to your air temp sensor - i wouldnt be doing any high rpm with it not plugged in, its responsible for altering the timing - which is very important to keep the engine from pinging/detonation.
