Q about CAI and IAT sensor

[Matthew]

i planned on it, but im sitting here in my shorts looking at the net i figured id see if i could find one.

 

[ForceFed]

i planned on it, but im sitting here in my shorts looking at the net i figured id see if i could find one.

Good luck but i doubt it.
Matt

 

[Matthew]

thanks, ill probably just get it from mazda.

 

[Puckpimp71]

A couple days ago when this post started up, I ran the part through a few databases and got some returns. I'm on my g/f's laptop right now, but I've got a few sites saved at home that got some results. If you don't get one tomorrow, I'll let you know what I find.

 

[Matthew]

thanks that would be cool of ya.

 

[Rainman]

What about fuel cut changes?

I have wondered about this for a while as a measure to combat Fuel Cut to some degree. Since the MAF uses change in air temperature to determine the amount of air coming into the engine (and hence the degree of activity going on in the engine) you should be able to adjust the MAF reading accordingly, by where you place the temp sensor.

As I understand it the MAF uses the temperature drop across its own sensor to determine air flow. It then uses the info from the temp sensor to calibrate itself accordingly for ambient temp. So if it measures a big temp drop it believes that there is significant air flow meaning that the engine is under heavy load. It consults the temp sensor to adjust the absolute temp drop and provide a temp range. If this is large then the ECU dishes out some Fuel Cut. If this range is narrow, then the ECU minds its own business. So what does this mean for the temp sensor position.

I used to think that putting it in a warmer spot would trick the ECU, but since the MAF uses it as a reference to establish the temp range it would seem to be more beneficial to put it someplace colder so that when there was a huge drop across the MAF sensor it would consult the temp sensor finding a cold temp and then find only minimal difference between the MAF temp and the ambient temp, suggesting only minimal temp change and therefore minimal demand on the engine. The ECU wouldn't get all upset and there would be less fuel cut.

Does this make sense?

R

hey guys,

If you pull out your IAT sensor and place it somewhere hot the temp reading will retard timing after 4800rpm right, so then if you have a CAI you are just advancing the timing since the IAT reads colder air right? Any ideas about where to put it so that I am not adding timing or retarding? The gains of my AEM seem to about equal the gain you would get advancing a disty a few degrees, I think that it the only reason these things make any difference, the rest it just sounds and faster spool from what Im gathering here.

Thoughts? Does this sound right? Did anyones else notice a drop in low,low end torque with the CAI (like 1500-2800rpm)

 

[MSPinVA]

As long as the temps it's reading are close to what's actually going in the engine, you'll be fine.

You know, I was thinking about this last night (all good ideas come either when you are half asleep or on the crapper, or both) and wouldn't it make more sense to put the IAT on the cold pipe, since that is the actual air temperature going into the motor? Because if the computer thinks the air is much colder than it actually is, wouldn't it dump more fuel to compensate for the denser air, thereby increasing hesitation? Just a thought.

 

[digitalpro5]

I think I'm starting to have issues with my IAT also. Started noticing that my battery light would turn on when ever I deacclerate (meaning hitting the breaks hard and slowing down pretty quickly). It only happens when I'm driving pretty fast and need to stop quickly. Could this be a temperature issue since my CAI, more specifically my filter is exposed more to the elements, and may be getting a rush of air while stopping fast. I hope my IAT isn't broken, never had the problem till I wired new fogs to the battery, and added neons in the interior, oh wait this happened even before those mods...hum.

Heres a picture of what I mean when its exposed.