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  1. 9

    Left and right bank running rich

    I have a California sold 1999 ford explorer with a 4.0L OHV engine. Apparently the injectors were a lower flow rate then the rest of the united states and I recenlty changed the injectors with standard higher flow injectors and I am getting a left and right bank rich light. How can I get this...
  2. 9

    Left and Right bank running rich

    1999 explorer 4.0 OHV (VIN X). I changed the head gaskets (#6 hole was blown), fuel injectors, MAFS, Spark plugs, wires, distributor, fuel pressure regulator, fuel filter. I keep getting a check engine light for P0172 and P0175, left and right bank running rich. The injectors were bought on ebay...
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