Upper Untake Holes On Underside

As stated,

MAP sensor (if speed density) on the rear, and charcoal canister on the front.

Window said:

I don't wanna spend the money to put it back in if it's just to prevent smell..

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It's purpose is to prevent uncontrolled hydrocarbon release into the atmosphere by burning it through the engine. Some may not care about this at all, in which case Install a vented gas cap, then cap the line back by the gas tank. Be carefull when opening the door as there may be gas fumes present.

Depending on where the original owner routed the line to vent, it could be a hazard since gasoline vapors are explosive. I'd definitely make sure the original owner didn't remove it and leave the vapor line just hanging loose somewhere in the engine bay venting.

Exits the pass side of the gas tank as a rubber hose that connects to a hard metal line right by the pass tailpipe look and travels up the passenger side of the car into the front inner fender area. It changes to a hard plastic line around where the pass strut tower is.

If you find the line in the engine bay somewhere, just make sure you vent it somewhere where it's constantly getting flushed with fresh air and vapors can't accumulate.

The tip would be to put the charcoal canister back, it's designed to properly vent gas fumes and is not that expensive fix, I think it would be safer too.