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Discussion Starter · #1 ·
Pardon my ignorance, but what is this unit, and what is it's function. On the left side of what's circled, it says "filter". So what does it do? Thanks!

btw, it's a 94 TBI. I've since had the engine rebuilt with a new intake that is egr-less. There's a tube that used to go from the egr to this unit that's now just plugged. I'm getting an IAC trouble code, and I know the IAC valve is below this unit, but I'm kinda wondering if this uknown unit has something to do with my iac problem.

 
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