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My '97 Honda Odyssey has 115,000 miles and has been maintained very well, oil changes every 3,000 miles, tune-ups when recommended, recommended servicing on its various components at Manufactuer's suggested mileage. 3 months ago, I started noticing unusual gas useage. I ran 3 successive checks on my gas mileage and My MPG went from 26 MPG before these checks to 13 MPG on these 3 checks. No engine lite has come on. Honda dealer mechanics cannot find any gas line leak, there is no gasoline smell, and the car runs great. Nothing showing wrong on the car's computer readout, so there is no "diagnostic code". Honda Mechanic suggested I do a "hard re-start" of the car's computer by disconnecting the cables from the battery and with the ignition key "on", touching the "positive" and "negative" cables together for 30 seconds. Then reconnect the cables to the battery, start the car and let it run for 15 to 20 minutes. No lites on nor A/C running, nor radio. This I did. Still no "Check Engine" lite and my MPG is remaining at 13 MPG. Could a "Fuel Injector Pressure Regulator" go bad without the car's computer picking it up? Or could it just be a "sensor" that has gone bad? Honda mechanic seems to want me to tell them what I want done about the problem.
