Re: Replacement of Oxygen Sensor - Saab 900 Bulletin Board - Saabnet.com
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LH 2.2 is the old fuel injection system, which you do not have.
Unless your new O2 sensor is a used O2 sensor or not connected properly, I would not suspect it. As Simon indicated the sensor is ignored until it gets up to temperature, which takes a solid 5 minutes or more from a cold start. It provides no reading until then, so the fuel injection system ignores it.
A stall after start is typically going to be a vacuum leak, but could be a damaged air mass meter or idle control valve. If you have a rough idle ever, you probably have vacuum leaks. The hole in the exhaust is not a factor - the system is totally unaware of everything after the O2 sensor.
posted by 12.195.130...
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