So, recently my locks stopped working and the engine won't shut off. It's not the punp 'cause the brakes are fine, there's vacuum. Is there a component the locks and fuel shut off share on a 79 240d with a manual tranny?

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

All vacuum components are interrelated so a problem in one area will effect another. You'll need a MityVac to trace down the leak. You could disconnect the yellow line under the hood and plug the line it went into. That goes to the doors. If the car shuts off ok with the yellow line disconnected your leak is probably in the door/fuel/trunk system.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

For some reason I thought the fuel shut off went directly from the pump to the ignition switch, then back to the shut off valve. Thios may take a little longer than I had anticipated. I'll try your suggestion.

__________________
Resurrected Nov 2010 - 79 240(SD) with 83 617 engine and 4 speed manual, 2.88 rear and 2.5" straight pipe unknown mileage (Salmon)
83 240D parting out
96 Dodge Cummins 5 sp 4X4 long bed - 310k

http://flickr.com/photos/11103112@N03/

You can test the fuel shut off itself by disconnecting the existing vacuum line, installing a section of vacuum hose long enough for you to suck on it. If you can shut if off with some strong sucks, you will know the shut off is ok and the problem is elsewhere in the system.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Or use a Mity Vac.

__________________
83 SD

84 CD

My 83 240d manual has the same problem. I just plugged off door locks until i can locate good info on diagnosing the lock system.

__________________

A leak anywhere in the vacuum system reduces the vacuum available everywhere in the system.

Same with my late '82 300D turbo.

__________________
83 SD

84 CD