A few months ago I bought a civic with a gsr swap. I was unaware until 2 days ago that the IAB's weren't wired up, so therefore they were open all the time. A buddy of mine noticed this, and he wired them up for me quick.

So my question is, theoretically should my gas mileage improve slightly during daily driving since the IAB's are closed under 5700 rpm? I noticed that my gas mileage wasn't ever outstanding and I'm now wondering if the IAB's being open all the time was reducing my gas mileage. I mean, more air = more fuel, correct? Thoughts?

 

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