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Old 03-05-2008, 07:44 PM   #20
BrianCMM
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Re: anybody done an IAT mod?

This mod can work, but not on a Titan. This was a quick, cheap mod that was used on DSM's (Eagle Talon's, Mitsu Eclipse's) as opposed to buying an expensive AFC (Air Fuel Computer). The mod only works if you really do introduce more air into the engine than the MAF has counted. That way the extra gas that's injected, due to the IAT resistor, will keep the engine in the proper stoichiometric range.

I had this mod for a while on my Talon. It's a turbo motor and is very easy to add more intake air. But the ECU would cut the fuel off after what it deamed was too much intake air passing through the MAF. Thankfully, it was also very easy to modify the MAF to allow more air to bypass the MAF sensor, thus eliminating the dreaded fuel cut, but also creating a lean mixture. To correct this lean mixture, an IAT resistor could be added to allow more fuel to be added and this would then richen the mixture. But it is still a guessing game, so I used a very sensitive Air/Fuel Ratio gauge to measure the exhaust gases and tune for the desired stoichiometric ratio.

But adding a IAT resistor (or these so called "chips") to an engine, without also adding more air, will do nothing but make your truck run worse...it will run too rich, which will actually waste fuel.
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