Originally posted by 97CS:
Is it vital to have that connected? I have the MAF hooked up and fine, but that one hasn't been hooked up for a while...



Well, maybe not critical, but that's the IAT (Intake Air Temperature) sensor. Since colder air is more dense, the computer takes a temperature reading of the incoming air, and can then adjust A/F in conjuction with reading from the MAF. Leaving it dangling in your engine bay, especially not close by the intake, may cause the IAT to get warmer readings from engine heat, making the computer think its getting warmer air than it really is.

I have heard of people just leaving it dangling around with no real ill effects, so I guess its up to you as to how you want to deal with it.

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