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Air temp sensor?? 

 

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 Post subject: Air temp sensor??
Posted: Fri Mar 17, 2006 1:38 pm 
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Just about to relocate my ATS as i have just fitted an explorer manifold have been told to fit it to the intake pipe just not sure whether to screw it into the hard plastic (dog poo looking thing) or the rubber hose? thought it might seal better in hard plastic? which way is most effective??
Any help much appreciated :D

 

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Posted: Fri Mar 17, 2006 4:35 pm 
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Rubber hose - air should flow across the sensor. I'd expect the resonator would produce an inaccurate reading.
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Posted: Fri Mar 17, 2006 4:36 pm 
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Agreed. Have it somewhere it can get a good sample of the air entering the engine.

IIRC AU's have them on the bend before the TB??

 

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Posted: Fri Mar 17, 2006 5:31 pm 
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Also consider taping it into the airbox itself, that would be far easier and IMO still give an accurate reading.
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Posted: Fri Mar 17, 2006 8:33 pm 
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EDXR8 wrote:
Also consider taping it into the airbox itself, that would be far easier and IMO still give an accurate reading.
I would go this way myself, the cooler the spot you place it the less power you lose when it heats up, they were actually put in a very bad spot from the factory ,as they absorb manifold heat and give a narrow change in current causing inaccurate fuel metering through the RPM range.

 

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Posted: Fri Mar 17, 2006 9:23 pm 
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Thanks guys and gals for ur help. Hopefully i can fire the car up soon!

 

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Posted: Sat Mar 18, 2006 8:52 pm 
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kenny wrote:
would go this way myself, the cooler the spot you place it the less power you lose when it heats up, they were actually put in a very bad spot from the factory ,as they absorb manifold heat and give a narrow change in current causing inaccurate fuel metering through the RPM range.


This isn't entirely correct. The computer is calibrated to suit the theoretical temperature differential of the senor and the air entering the cylinders. If you move the IAC sensor to a cooler spot the computer might have a little trouble initially. Saying that, having a MAF makes the IAC almost a waste of time.

Give it a shot where the AUs have it, in the rubber pipe about 8 inches before the TB.

 

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Posted: Sat Mar 18, 2006 8:59 pm 
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The MAF and ACT sensors both work in conjunction to determin the amount of air going into the engine. Technically you should have the sensor as close to the cylinder as possible to get an accurate reading of the temperature of the air and therefore its density entering the cylinders. They do suffer from heat soak in the manifold though so generally run a little hot anyway, something the EEC is not calibrated for. Moving it to the inlet pipe will stop this heat soak but it will also have cooler air passing through it so it will read cooler than it actually should be rather than hotter. In the end both methods are relatively inaccurate and it probably doesnt matter all that much anyway.
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