What is this wire?

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lee0123567

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What is this wire? What's it for? And where does it go?
 

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RetroC10Sport

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Not a wire, that's a vacuum line. It goes to the A.I.R. control valve.

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lee0123567

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Is it very important to have hooked up?
 

89Suburban

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That's a matter of opinion. I would. Or at least plug it off so there is not a vacuum leak.
 

RetroC10Sport

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I'd just plug it unless the A.I.R. is needed to pass emissions, then I'd repair it. But I know Ohio doesn't have emissions testing any more in most if not all, counties.
 
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lee0123567

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Could it be a reason why my truck idles like ****? And by **** i mean it stumbles and surges a lot
 

4thgentruck

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I would plug it and see if it helps the idle. I know in my experiences small vacuum leak can make u think a world of things is wrong. And over time if u get a little time just replace it. But deff plug it off for the time being.
 

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