IAT Override Question [Archive] - GrandAmGT.com Forum


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04-26-2004, 04:02 PM
i was going through the mods section of grandamgt.com when i cam across the IAT override mod. this is something i wanted to try on my grand am just for the fun of it. only problem is the diagram pictures dont match up with my engine. the sensor shown in the picture isnt in the same place on my car. i have a 97 grand am gt 3.1L and was wondering if it was possible to do this mod and if so if anyone could help me out.

thanks :boogie:

04-26-2004, 04:21 PM
Don't bother , ( i got this from a well known V6 web site , but it will tell you all you need to know ) [ IAT stands for Intake Air Temperature. It is a simple thermistor that changes its resistance according to the temperature it is at. The idea beind this modification, is that by changing the resistance to that of a cooler interpreted reading, you will get more fuel. While it is true that you will dump more fuel...its false that this is a good idea. Running rich is bad for performance, so you are just wasting your time with adding more fuel in this fashion.

The stock computer already compensates fuel as it is, so trying to trick it into giving you more fuel is completely worthless. If you dump too much fuel, via switching to a colder resistance on the IAT while driving, you may even notice a puff of black smoke out the exhaust. Then, the O2 sensor will detect the overly rich mixture, and reduce the injector pulse width. This totally defeats the purpose or the IAT mod ]