Thermo Vacuum Valve! It actually controls the release of fuel vapors from the Charcoal Cannister and connects the intake manifold vacuum to the fuel cannister area on the fender to open the valve and allow fuel capors back into the intake! Opens at 50 degrees. 22 buck part. and I broke mine doing the same thing! You can get way with just routing the line from the intake side to the Y adapter so that your vacuum advance will still function! To see if that is the problem. I re-did all my vacuum connection a month ago and now things work a lot better. Cracked rubber vacuum connections can effect everything from braking, heater control, advance, and shifting of the auto tranny. One leak and the vacuum level drops in the intake manifold ever so slightly, a few and you get more drop!

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....