Quote:
Originally Posted by BillGrissom
Not sure which car you are talking about. In my W123, I can easily remove the vacuum switch by itself. You must remove the under-dash cover (how many times have I done that?). I might have used a phillips insert in 1/4" socket wrench due to limited clearance.
Before doing all that, you can test the vacuum switch. It would be easy to swap the 2 brown tubes going to it, in which case it wouldn't work. It is a SPDT switch. The tube from the shutdown valve should go to the "pole". The vacuum source should go to the "terminal" which is active with key switch in OFF. The other "terminal" should be open to the air (can't see it) and active when key switch is in RUN and CRANK.
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It's my 81 240D I'm talking about. I suspect a problem in the internals of the contraption because when I switch off I get a slight attempt at an engine slowdown, as if the system is trying to shut off but thinking, nah, can't be bothered. If it push and twist hard on the key (not hard enough to break it etc...) it seems to have slightly more effect, but nowhere near enough to switch off. Which seems to indicate some internal issue rather than a compromised vacuum line.
I shall attempt to get in there from under the dash and see what can be done before resorting to screwing around with the whole instrument cluster and ignition lock removal.
- Peter.
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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S