Hey Oyster,

Just saw your post.

I was reading the shop manuals a few days ago regarding error codes stored in the computer. My 93 300d is storing codes for both vacuum transducers, but I replaced the y31/1, so think the problem is a leak in a shared component somwhere.

Vacuum testing for the components you mention seemed to be contained in those docs.

If you will look up codes for the vacuum transducer failures, and crossmatch to the appropriate tests, you might find what you are seeking.

hth,

Jack