1998 Oldsmobile Aurora Q&A

1998 Oldsmobile Aurora Question: Check engine light came on. Is running a little rough....could it be bad gas?

Codes P0171, 0174, 0300 came up. How do I find out what they mean? Gas cap has been checked and is good. -
Answer 1
ck for vac leak and then misfires.vac leak may be causing misfires -