Re: Take it back - Saab 9000 Bulletin Board - Saabnet.com
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Re: Take it back
Posted by Eric Law [Email] (more from Eric Law) on Tue, 1 Apr 2003 14:09:48
In Reply to: Take it back, MarkusJ, Tue, 1 Apr 2003 13:50:49
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Well often the diagnostic codes lie, but they're a good starting point. Try disconnecting the O2 sensor and driving the car for a SHORT period of time. If it runs significantly better, it's probably time for a new O2 sensor.
My second-choice scenario would be that the mixture is actually rich. There aren't too many things that can cause this: disconnected/defective vacuum hose to the fuel pressure regulator is a likely candidate. Other possibilities are bad fuel pressure regulator, injector stuck open, or a short in the wiring causing an injector to fire all the time. In the "much less likely" department would be a bad hose to the MAP sensor or bad MAP sensor, bad temperature sensor (intake or head), or bad ECU.
Eric Law
posted by 206.96.16...
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