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Air Mass Meter and Oxygen Sensor test results - do they need replacement? 200 1986

I have an 84 245 automatic, which was geting poor gas mileage when I got it. After much messing around, it turned out to be a old air filter. Looked OK but was just mostly plugged.
Right now that car has the O2 sensor disconnected and gets about 22mpg mixed driving.
My O2 sensor failed on my 745 recently also. In both cases the sympton was poor and slow idle. Try disconnecting the sensor to see if things change mileage wise.
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744-16v,745-16v,242Turbo.245DLT






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