02 olds alero 3.4 70000 miles. started running bad pulled codes had p0404 egr valve. replaced egr valve and replaced fuel filter didnt help. checked fuel pressure has about 50 pounds . car wont rev. over 2800 rmps it bogs down. dont pull hills good. transmission dont seam to shift right when you press the gas pedal to the floor it just bogs down. no other codes stored. any ideals?