Andrew ;
Your comment " tightened up the ignition switch connections " is very telling ~ you _cannot_ tighten up a vacuum leak ~ you *MUST* replace the short bit of rubber hose that was loose .
Then , carefully and methodically go around the entire car and replace every single short hose bit you can find as they get old and don't seal properly , the *only* cure is to rep[lace them all , this takes far more vacuum hose than you think so buy 10' at least .
Then begin replacing all those rubber 'Y' connectors .
Then and not before , can you consider anything else .
-Nate
Andrew wrote :
>
> Hi all
> Apologies if this has been covered. My 82 300D turbo has developed a vacuum leak and I am trying to resolve it. Started to take a second longer to shut off and the locks were slower so I replaced the vacuum shutoff. All went back to normal. Later in the day I changed the oil and filter and it started doing the same thing, so I checked all the connectors around the filter housing. No improvement. Pulled the under dash panel and tightened the ignition switch connections and then all seemed resolved. Now, several weeks later, it is acting up again - slow shut off, locks barely working, reduced flow from dash vents. Brakes and shifting are fine. Odd thing is, last night While driving i turned off the climate control and a few secs later the door locks started working and the engine shut off just fine. I will grab my vacuum tester and start checking the system but the question is whether the shutting off of the acc leads to any clue re the source of the leak. Any thoughts will be appreciated.
>
> Andrew
> 71 250C 62k
> 82 300D 166k
>
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