Stalling and low engine idle due to bypass air control valve failure on Mazda 626

Problem Description and Possible Solution
The "Bypass Air Control Valve" can fail causing a low engine idle and possibly stalling.
Problem Data
RepairPal Verified
Average mileage: 154,167 (68,500–234,000)
Engines affected: 2.0L 4 Cylinder, 2.2L 4 Cylinder, 2.5L V6
6 model years affected: 1990, 1993, 1994, 1995, more1996, 1997
16 people reported this problem
Viewing 1 - 4 of 4 comments
Car runs fine when cold and warm, once it gets to hot, on faster acceleration and super slow driving (like parking) and at red light in gear (automatic) the engine starts roughing about. Sometimes it even stalls.
Cleaned spark-plugs and distributor, changed fuel filter, air filter and problem continues.
Runs great cold.... very rough idle when in gear warm ~500RPM- shift to neutral.. all is ok