Can't find the IAT Sensor HELP.

[ABZ23K]

hi im wondering if anyone can help i have a 1992 mazda 323 astina sp and i can't find the iat sensor ? can anyone please help or have a picture of where it is, thats if there is one thanks.

[cazza]

I am after this to...
i am pretty sure its one of the wires that are connected to the air flow metre
but WHICH ONE??
i could be wrong, there is a possible also opposite the idle adjuster, but i decided againts this as i think it has to with the mixture itself not the air temp.
can someone please help me find it The IAT Sensor please

[ROB-80E]

For those who don't know...I'm pretty sure your refering to "Intake Air Temperature".

Yes cazza you are right, the IATS is built into the AFM. I can tell you that the signal can be found at wire 2P at the ECU in Manual transmission vehicles.


Out of curiosity, why are you trying to locate it?

[Lawsy]

Almost guarantee its to put a 4.7kohm resistor on there....

If looking from above the AFM from the front of the car (ie, the plug seems to at the top of your view) then I think its the far left pin, then find the earth...
Simply get a multimeter out, and test the far left pin and find whichever pin is earth by looking for a resistance of 2k - 3kohm, depending on temperature. I'll look in my book later if you're still stuck...

Cheers
Tim

[cazza]

Legend, lawsy...
rob 80e, well im only a junior was just wondering so i could put those resistors on there, but after some research of these forums and other site ive decided against it, allot of negativity surrounds these cheap mods so ill give it a miss,
thanks anyway mate

[zappy65]

what does the resistor do??? does it slow down the signal or something?

[asanga]

it is to trick the ECU to think the engine is running cold ( IAT resistance is high when the engine is cold) and injectors dump more fuel increasing power.

[Dogo]

and its a fairly dodgy method, generally not advisable

[Lawsy]

There is one way of doing this (for very minimal benefit) if you're not running a turbo, and that is to put around a 500ohm to 1kohm resistor in series with the IAT. The point of this is fairly simple; to get a little more fuel, while holding true (up until 45 degree's anyway) with the standard fuel curve...
I've done this as an experiment, along with 98 octane fuel, to see how the SOHC NA responds to timing adjustment...

The answer is, worth doing, but not a PHOAR ITS GOT SICK POWER BRO modification...
It does, however, smooth out your idle slightly (to be expected) and throttle response below 3000rpm increases, slightly; I find myself able to hold higher gears going up slight hills with relative ease, and top end power is probably a little better, but I'm being very attentive... Most wouldn't tell at all.

Since it clearly didn't change much, I just left it there and haven't cared about it since.... I used a 560ohm 2w resistor, I might try an 840ohm resistor and see if I can push the timing forward a little...
I'm running iridium plugs (since I get them for 10 bucks a plug through work) so heat isn't an issue... And the valves will be fine.

I dunno if I could be bothered though...