Cadillac Repair: 96 cadillac deville problem, mass air flow sensor, mass air flow

Question
hey i got a 96 cadillac deville one day it just wouldent start so i put quick start in it and then it finally starts but it wont start unless i use quick start but when i go to drive it if i push the gas to much it sounds like it's bogging out so i got to barley touch the gas to get it going i dont know what it could be i got codes po171 and 174 which is system to lean bank1 and 2 emission code oxy sensor i took it up to auto zone and they said check the pcv for air leaks and i cant find any at all so they said clean the Mass air flow sensor so i did it but still having same problems so my dad thinks its my fuel pump but it still comes on for about 2 seconds when i put the key in the on position if you have any idea please let me know thanks.

Answer
check your fuel pressure. Sounds like your dad is on the right track.

NOTE: If you do have to replace the fuel pump due to low pressure, You MUST clear (erase) the CODES from the computer via the climate control panel.

Disconnecting the battery or pulling fuses will NOT clear the codes from the computer, You MUST use the climate control panel.