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  1. J

    Fuel Pressure Regulator Help

    My 1991 Mazda Navajo (94k miles, Auto) has been surging at idle (it varies between 500-800 RPM) and the exhaust smells rich. Fuel economy has been down as well. This all started 3 weeks ago and since that time, I have run a scanner on it which revealed a code 41 (oxygen sensor.) So I replaced...
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