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Discussion Starter · #1 ·
Recently purchased a evo 4 and noticed that the boost guage wasnt working. Traced the hose from the boost guage to the passenger footwell didnt see where it entered the firewall had to go to sleep. I also noticed this in the engine bay loose and wanted to know if they are possibly related and what it is. Sorry im new to this

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iS IT SOMETHING TO WORRY ABOUT WITH IT JUST HANGING THERE?
Depends - you need to follow the black pipe back, see where it ends up. If it is connected to the engine vacuum system, then the pipe needs at least blanking off. If it is not actually connected to anything then it wont matter. Chances are the previous owner had other stuff fitted that has been removed for the sale, but the pipework has just been left. There is also a good chance that pipe will trace back to your dump valve, explaining why its not working. Its a case of seeing where it comes from first
 
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