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Mileage drop

550 Views 4 Replies 4 Participants Last post by  karmutzen, 
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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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BruceX5RL said:
Time for compression tests, if ok, walnut blasting to clean the internals. New rings, all new tubing associated with the engine, other small items.
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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??
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