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Mileage drop

548 Views 4 Replies 4 Participants Last post by  karmutzen
210,000 miles, mileage dropped to 14-15 mpg. Changed plugs, air filter. Not throwing any codes. Today I changed the two upstream 02 sensors. We'll see what happens.
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How about slowing down and testing a few other things first?? Valve adjustment? Brakes dragging? (calipers float on pins that are notorious for seizing up and may cause dragging). Tire condition and inflation? Are there any codes??
Correct - eliminate the obvious and then get a baseline..did the mileage drop suddenly or over a time period ? Have you cleaned the induction system ? Have you taken "live" ODBC readings with a product like the Blue Driver scanner to look for anomalies in fuel distribution/use ?
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