St205/St215 air box sensor thingee

[DCEIVD]

Does anyboady know what the sensor that is mounted to the factory air box is for?And more importantly can I remove it with out it having detrimental effects on my car?

I'm looking at having some custom intake piping made and want to know if I need to allow for this sensor or not.

[slighty_sykotic]

Probably air temp sensor at a guess?

--Sykotic

[DCEIVD]

Thats what I thought initially? But Im not so sure.

[Jebus]

Yeh or air speed, what does it look like? Is it a spear shaped thing?

Could always just insert it into one of your silicone joiners on your intake piping, thats what ive done with mine.

[slighty_sykotic]

Can you describe it?


( I don't own one of those cars )

--Sykotic

[fivebob]

I can't see any use for it as Gen III+ engines all have manifold temp sensors, which they should be using for fuel and ignition compensation.

However, though it might not be used to determine fueling and ignition, I don't know if removing it will cause the engine check light to come on or not. I guess you could just replace it with a 2.5kohm resistor and the ECU would think that the air temp was 20°C all the time.

[slighty_sykotic]

Well, my 1st gen afm gze made a temp sensor in the afm, aswell as another seperate air temp sensor in the manifold.


I'd say tee it into the new intake, or if not, then do as he ^^ said, replace it with a resistor.


--Sykotic

[fivebob]

Yeh or air speed, what does it look like? Is it a spear shaped thing?

It's the spear shaped thing, but it's definitely a temp sensor. Actually it's the same sensor that the SW20 uses for engine bay temp, which everyone disconnects to switch the I/C fan on permanently .

[DCEIVD]

Yes the spear shaped thing. No sorry I do not have a picture of it. But fivebob knows what I'm on about.
Just a friend of mine has it disconnected on his 215 and I was curious as to what it was - he doesnt seem to have any adverse affects from his ecu?

[RunningRich]

It is an intake air temp sensor.

Given that it goes directly to the ECU, disconnect at your peril.

http://gtfour.supras.org.nz/pics/ECU2.pdf

That said, it is not uncommon for one SW20T I know of to spit it out, with no noticeable difference in operation. I suspect it is just an outside air temp compensator.

[DCEIVD]

No worries - allow for it I will...