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P0301, P0302, P0303, P0172 and P0174 codes.
Hey Folks I need some help. 2000 Explorer 4.0 s.o.h.c. I have codes 300 multi cylinder. 301,302,303 p0172 and p0174. I have changed the upper and lower intake gaskets. I have replaced the all 4 O2 sensors and fuel filter and checked pressure while driving stays around 65. Engine runs rough and...
