Thread: Shut off valve
View Single Post
  #13  
Old 07-26-2021, 09:32 PM
Alec300SD Alec300SD is online now
Registered User
 
Join Date: Nov 2013
Location: San Mateo, CA
Posts: 1,163
Quote:
Originally Posted by dsvw View Post
So you don't think it is the shut off valve?

When I apply vacuum to the shut off valve brown/blue hose, it shuts the car off immediately but it doesn't hold the vacuum too long.

I will investigate the ignition switch vacuum circuit.

Thanks
You do have a leak in the ignition switch/shutdown circuit based on the above test.

Most likely culprit is one or both of the rubber vacuum connectors.
The brown/blue or brown hard lines might have cracks, but not very likely.

The shut off valve on the ignition switch can fail if the works get gummed up,
it is possible but not as likely as a failure of the rubber connectors.
__________________
78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022
Reply With Quote