The past few weeks my car has been a little on the lean side, opposed to normal. I know that without wideband, i know that a regular air fuel gauge is pretty much a light show... but normally it would stay in the green area when i give it a lot of gas. Well recently every once and a while(usually at idle) the gauge will read completely lean, and the car will act like it is misfiring. The past few days it has been doing it worse. Over the past few months i have notices that my air/fuel has gradually become leaner and leaner. So today I took my car to autozone to get them to scan the computer. The only code that it threw, besides auto tranny codes, was P0113... which is the Air Temperature Sensor High Voltage. After i turn the car off for a few minutes, then crank it back, the A/F will be so lean that it barely registers on the guage, and the car will misfire. After i drive around(very easily), the reading will gradually get back into the Stoich range, and the misfire will stop. We were thinking that if the IAT sensor was bad, other sensors would try to compensate for the lean A/F and start adding more fuel(if that makes any sense). Does it sound like the IAT sensor is the problem? If not, what else could it be?

 

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