On an '82 240D: vehicle will not shut off, need to to use the under hood red lever, vacuum test leads to the ignition switch. After vehicle is shut off I can hear a hissing from behind the instrument panel. Is it possible that the switch it self is leaking? Thanks for any input.

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

Mine did that (83 3200sd, same vac valve) squirted alcohol into the lines (brown and brown/black stripe) let sit for a bit blew out with shop air, valve not sticking now two years later

Brake cleaner is too harsh on the plastic in there

or buy 000-460-02-84-M22

Sounds like the vacuum switch is bad. You can try cleaning it.

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1987 300E

Be sure the Vacuum Lines go back in the positon you removed them from or it will not function correctly.

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84 300D, 82 Volvo 244Gl Diesel