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Message: <blockquote data-quote="Canuck714" data-source="post: 2063949" data-attributes="member: 6707">Have a new to me 14 with brand new engine, Whipple, 3.25 pulley/Ford racing throttle body big heat exchanger. Assuming a complete stage 2 kit.Have been getting code P0148 and lean bank 1 and 2 codes. Truck runs and drives fine.Tried spacers and new downstream O2 sensors, clear the code and after 3-4 drive cycles it will come back. I have checked for possible air/vacuum leaks and dont appear to have any.Thinking injectors or fuel pump may not always have the right pressure, or may MAF sensor issue?Anyone else have this issue?</blockquote>