The Garage - IAT Sensor
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Last Updated: 12/3/2013
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IAT Sensor Mod

Summit Racing Equipment
Address: P.O. Box 909
Akron, OH 44398-6177
Phone: 800-230-3030
Click here to visit their website.

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The fabrication, modifications and designs you see on this web site are completed by myself. If you duplicate these modifications you do so at your own risk. I do not endorse or make any claims to their safety, performance, On-road or off-road worthiness. Any "Product Reviews" are my sole and personal opinion. These reviews are on items purchased from or provided by reputable aftermarket suppliers. All registered trademarks belong to their respective owners.

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If you follow up on my projects, you may have noticed that I didn't mention the re-install of the Intake Air Temperature (IAT) sensor in conjunction with the Hughes FI Airgap Manifold Project. This is because the new Hughes intake did not provide a location for it. That comes in handy for me since I would have relocated the IAT Sensor anyway. This is a very simple and dyno proven modification that will work on a great deal of modified fuel injected vehicles as I have done it in the past. The IAT sensor tells the computer how hot or cold the incoming air is. The computer will then adjust the amount of fuel being injected, as well as make minor adjustments to timing based on that reading.

The comon problem is that in many vehicles, the IAT sensor is located in the intake manifold, near the cylinder head. Therefore the air that the IAT sensor “reads” is much hotter than the air, say, in the intake arm. The idea with this mod, is to relocate the sensor to a new location.

This will cause the computer to believe that incoming air is slightly cooler, causing it to inject more fuel and advance the timing a tad. The performance gain can be anywhere between 1 to 5 hp. That's pretty cool for a little bit of work and it doesn't hurt the wallet either.


The Durango IAT Sensor with a 2-pin connector produces a variable resistance from ~100K-50 ohms.
The basic procedure of this project is to move the existing IAT sensor to a new location which provides cooler air and therefore the ECM/PCM adjusts accordingly and the engine produces more power.
I purchased from Summit Racing a complete AEM Power 30-2010 - AEM Power Air Inlet Temperature Sensor Kit for the Durango. The main reason to do this was a) if the sensor would be damaged during the re-location and b) I wanted to have a spare to experiment with but without the need on having the sensor to be removed from the vehicle.
Let's get strarted:
1. After disconnecting the negative battery cable and removing my Mopar Performance air cleaner I am cutting off the OEM IAT sensor cable 2" below the IAT sensor connector .

2. I prepare by setting up my solder station and getting my "Third Hand" in position. This is a nice tool to have and usually available for under five bucks. You may also try Radio Shack.

3. Stripping a small amount of insulation from the cables and preparing two pieces of 12" cable for the existing ones to be extended. I sleeve waterproof shrink tubing over the cables before soldering it to the cable on the engine side. I then solder the original IAT sensor connector to the extended cable. A lighter shrinks the tubing above the solder joints to protect these from corrosion.

4. After the soldering has been completed I am wrapping the entire cable with electric tape twice and add black wire loom.

5. I am routing the IAT cable to it's new location next to the throttle body just right under the air filter.















6. I have drilled a hole for the OEM IAT sensor into the my Mopar air filter base using a step drill. Then I fastened the IAT sensorinto the base by screwing it carefully in. The pictures are showing the bottom and the top of the install location.

The last picture showing the IAT sensor in it's new location along with the air filter element in place.

After re-installing the airfilter and plugging in the IAT Sensor the project is done. The entire project was completed in a little under two hours.

Verdict:
As soon I was back on the road for a quick test drive I actually could feel the performance increase which has been gained by simply finding a better location for the new IAT sensor.

I have done this mod on various vehicles with more or less success. However, the Durango really showed a noticable performance improvement for which I was hoping for.

...and let's not forget that this is a performance mod which is absolutely free, and who doesn't like free power, I certainly do!.



This project was completed on 01-04-2010




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