2005 Dodge Dakota

Looking for answers to a problem with my 2005 Dakota 3.7 V6. It misses on slow acceleration between 35 and 55 mph. . if I mash the pedal it accelerates fine. . 2 check engine codes come up.  PO152 and PO300. . I have changed cat converter (whole unit) and all 4 O2 sensors.. upstream and down stream. . Fuel pressure is 52 PSI at idle and 62 PSI when revved up.. I have a good scanner but a lo of the info it gives me I have yet to understand.