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Old 06-11-2008, 12:36 PM   #11
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Join Date: May 2008
Posts: 172
Country: United States
Originally Posted by Erik View Post
If you ran the EGR through the air flow meter then your car would run too rich. This would waste fuel.
Ah that makes sense, the Air flow meter is not that advanced, its just a heated wire and thermistor.

Originally Posted by Erik View Post
The black powder is probably just soot that has collected from the exhaust.
Yeah, the car is almost 19 years old.

Originally Posted by Erik View Post
I'm surprised that a 1990 Saab 900 doesn't have an Oxygen sensor-
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.

Water is fuel, I just don't know how to make it work yet.
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