what's a check valve? could a bad check valve cause the engine to not shut off? how do you check it? thanks again in advance fellow die-hards!

rodsob

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$500 1982 240d owner "Gunter"
125k miles,4 speed manual
crank windows, MB Tex, all original
no a/c, daily driver
Scorecard so far....
$230 Maaco paint job
$27 dimmer switch, $40 shutoff valve, $45 brake MC, $260 calipers, $40 brake hoses, $40 side fender trim, $20 balancing, $109 lifetime alignment, $10 fuel return lines, $115 oil&fuel filters for next 30k miles

Your car requires vacuum to shut of the engine. When you turn the key off, the switch ports vacuum to the diaphgram at the back of the inj pump. This shuts the fuel off to the pump. You can have a leaky door lock diaphgram and it will bleed enough vacuum off to keep you from shutting down. At the firewall you have a bunch of vacuum lines that run into the car. Un plug the Yellow line, plug the rubber fitting that you removed the line from and try to shut down the car. You can also have a weak vacuum pump. How does your power vbrakes work??? If good, then the vac. pump is good. Ck ALL of the vac. connections under the hood. GOOD LUCK!!!

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

brakes work fine. it is vacuum leak somewhere then. thanks

__________________
$500 1982 240d owner "Gunter"
125k miles,4 speed manual
crank windows, MB Tex, all original
no a/c, daily driver
Scorecard so far....
$230 Maaco paint job
$27 dimmer switch, $40 shutoff valve, $45 brake MC, $260 calipers, $40 brake hoses, $40 side fender trim, $20 balancing, $109 lifetime alignment, $10 fuel return lines, $115 oil&fuel filters for next 30k miles