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

The "Bypass Air Control Valve" can fail causing a low engine idle and possibly stalling.
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Average mileage: 154,946 (68,500–234,000)
Engines affected: 2.0L 4 Cylinder, 2.5L V6
5 model years affected: 1993, 1994, 1995, 1996, more1997
10 people reported this problem
3 people shared problem details
1997 Mazda 626- 2.0L 4 Cylinder68,500
Runs great cold.... very rough idle when in gear warm ~500RPM- shift to neutral.. all is ok
1994 Mazda 626- 2.0L 4 Cylinder234,000
idles low once warm
1994 Mazda 626- 2.5L V6167,000
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.
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