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$ for MAF and O2?


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Having a good O2 sensor seems to have a big impact. By changing mine, I've almost completely eliminated pinging on big hills and improved my gas mileage. I'll have to go through a few more tanks to get a firm measurement, but my gas mileage seems to have gone up by as much as 5 MPG.

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I didnt say it was completly pointless. I said it works fine with out it on my SPFI. Do I get worse milage? Yes. Does it still run fine? Yes. Do I care? No. I lost more than 5MPG with big tires; I don't drive my Subaru because it gets awsome milage.

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