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An O2 sensor can improve your mileage

In the spring i replaced my catalytic converter and O2 sensor. Over the past few months I have been able to confirm a 1-3 mpg improvement. My 745-16v would get about 25 around town, 27 on the highway. Now i get 27 around town, up to 29 on the highway. It was quite noticeable when i put a scope on the new sensor how much faster it switch from lean to rich.
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744-16v,745-16v,242Turbo.245DLT








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An O2 sensor can improve your mileage

So, your old O2 sensor cycled, but at a different frequency? I checked mine once and saw the voltage cycling and assumed that was good enough. I have a fluke scopemeter I can hook up to it and check frequency. Can you tell me the frequency of your new and old sensors?
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Paul NW Indiana '89 740 Turbo 105,000







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