Rough Idle Due to Broken Vacuum Tee on Mazda Millenia

Problem Description and Possible Solution

There are T-shaped vacuum connectors under the intake manifold that can break and cause a rough idle.

Problem Data
RepairPal Verified
Average mileage: 143,833 (106,000–177,000)
Engines affected: 2.3L V6 Supercharged, 2.5L V6
8 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002
15 people reported this problem
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Viewing 1 - 6 of 6 comments
mechanic damaged the intake which have a vaccum leak. need to know how to repaired the vaccum leak and the cost of repair.
Rough idle=repair pending
the dealer found the problem. Have not been fixed yet. Looking to find the tee connector at local auto parts store.
We replaced the valve cover gaskets, and after putting everything back together, the car stalls after idling for a few minutes. After restart, it stalls more quickly.
the idle up when the car is hot
Car was in for service and the next day it began to idle rough. I brought it back into the shop and they identified that the t valve had become cracked and was causing a vacuum leak. The mechanics denied any wrongdoing and so I took the car to another shop to repair the issue. Not saying that they broke it but their ice cold bedside manner didn't provide enough reassurance for me to keep shelling out perfectly good benjamins to suspect mechanics.
lesson learned.