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No the line I am looking for to find out where it goes is the one that has a diagonal cut on the end and the end is sitting on top of the battery post. It is a thin plastic line but does have some vacuum. So far I have plugged it up but it must either connect to something or is some kind of vent but then why would it have a vacuum? It is connected to a fitting that has two other large rubber lines connecting to a check valve. plugging it or not does not seem to make the engine miss.
I'm gonna go with dash vent solenoid supply line for a hundred Alex . If it has a vacuum on it with the engine running it's a supply line to something. The only hard plastic line in that area is the dash vent control supply line. Hopefully you find the other end of it poking out of the pass-thru grommet there just below it on the firewall. You can splice them back together with a short pi