Quote:
Originally Posted by Erik
If you ran the EGR through the air flow meter then your car would run too rich. This would waste fuel.
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Ah that makes sense, the Air flow meter is not that advanced, its just a heated wire and thermistor.
Quote:
Originally Posted by Erik
The black powder is probably just soot that has collected from the exhaust.
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Yeah, the car is almost 19 years old.
Quote:
Originally Posted by Erik
I'm surprised that a 1990 Saab 900 doesn't have an Oxygen sensor-
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The 1990 Saab 900 using the C14 Lucas fuel injection system did not have a catalytic converter, the Government mandate came in on 1993, so Saab never put an expensive CAT on the car and didn't think they needed a 02 sensor, funny thing is I believe my ECU has an input for a 02 sensor but it has never had one, shame really as I think there very useful.
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