hey i just bought a 1997 saab 900 turbo about 2 weeks ago, and dont really know too much about it as for maintenance. 2 days ago, my check engine light came on after i hit a big bump. i got it checked out at autozone and they said its probably the O2 sensor reading bad, or a vaccum leak. im gonna say vaccum leak. every so often when i start it, it idles really funny. i jumps from about 900 to 1200 back and forth for a few seconds. i also noticed a small loss of power. what should i start looking at? next, my brakes rattle really friggin bad. every time i hit a bump, all i hear is all 4 brakes rattling. how do i fix this without buying new brakes just for the shims (or whatever they are)? i think that is all for now. thanks in advance for the help.
dave