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Vacuum Line??? Where does it go?

iloveboost

Proven Member
46
1
Jul 25, 2014
Vacaville, California
Where does this vacuum line go and would the fact that it is not attached cause a CEL to come on? I recently installed a defective MBC (Ebay piece of junk), this required me to unhook the SBC and then the CEL light came on. Is this normal to get a CEL with a MBC? In any case I was having problems with the MBC so I hooked the SBC back up and the CEL stayed. I figured that maybe the CEL will stay until I drive it around a bit but I have put several hundreds miles on it and the CEL is still on. I have already ordered an OBDII bluetooth adapter and plan on checking the code but I found this loose vacuum line and I am wondering if it is the problem. It looks like it comes through the firewall right about where the glove box would be. Where does it go? And can it be my CEL problem?
 

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NY 95 TSI AWD

Proven Member
212
39
Aug 15, 2008
North West Florida, Florida
What is sbc? Do you mean the stock boost control solenoid under the air filter area? That would give you a cel because the ecu see's that its unplugged. I would just disconnect the battery for a little while and the cel should be gone when your reconnect the battery. I'm thinking that vacuum line was probably from an in-cabin boost controller?

Is the hose looping through the firewall twice? Its hard to tell where its coming from in the pic, but It definitely is not stock.
 

NY 95 TSI AWD

Proven Member
212
39
Aug 15, 2008
North West Florida, Florida
I didn't even think about the windshield washer hose. It does run from the trunk and makes its way into the engine bay. Makes sense.
 
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