You can test the shut-off valve with a length of hose and the suction provided by your mouth. If the valve works, then most likely a hose is leaking. Could also be the vacuum switch on ignition, or weak vacuum pump.
Is the cover on your vacuum pump crimped on, or screwed on? Original crimped cover pumps prone to catastrophic failure, which can destroy the engine. -- Max Dillon Charleston, SC -------- Original Message -------- From: WILTON <wilt...@nc.rr.com> Sent: April 3, 2014 9:55:26 AM EDT To: mercedes list <mercedes@okiebenz.com> Subject: [MBZ] 124 wonky shutdown Since yesterday morning, my '87 300D has has gotten increasingly hard and slow to shut down after turning key switch OFF. By late afternoon yesterday and this morning, it merely slows way down to barely rotating but continues to "run" (extremely slowly) with key switch OFF. I know about the shutoff lever on the IP, but haven't used it yet. Last three times, I held brake and put it in gear and let it "lug" off. Unable to find any vacuum leak, yet, and tranny shifting seems normal. The shutdown seems as if the shutoff valve is partially closed, but is letting enough fuel to get past it to let the engine continue to run VERY SLOWLY. Suggestions? Shutoff valve on IP not fully actuating? Wilton _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
