I have a 1985 300TD with vacuum issues. I am trying to simplify and eliminate leak potential by removing the door locks from the system. Is there a main line that I can cap to turn the door locks manual?

Will this help resolve other potential system problems like the engine not shutting down and hard shifts?

Any help is always appreciated

Karl

Just disconnect the yellow line under the hood and plug it. That will disable the locking system.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

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That depends on where the vacuum leaks are located. The EGR control valves on the valve cover are also likely culprits if they are still installed.