U get to 50 mph and it acts like its running out of gas what could that be

First change your air filter.

Check fuel filter first, engine is ok at lower rpm but it sucks more as speed increases

Just a note here: .. Gasoline engines in this vehicle are NOT equipped with an external - serviceable fuel filter! .... The filter is an integral part of the 'in tank' fuel pump module... Testing fuel pressure and a professional scan test is the best approach to diagnosing this problem.