1997 Mazda 626 Stalling and low engine idle due to bypass air control valve failure

Affected Model Years

• 1997 167,000 Miles
  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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• 1997 68,500 Miles
  Runs great cold.... very rough idle when in gear warm ~500RPM- shift to neutral.. all is ok

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• 1997 234,000 Miles
  idles low once warm

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• 1997 150,269 Miles
  Low idle and stalls out when coming to a stop

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