replaced MAF, light still comes on??

also i kept getting a code 34 (the MAF sensor) and i was gettin bad gas mileage so i replaced the MAF sensor, an the oxygen sensor and i disconnectd the battery for like 30 mins (while i went to get a new battery, it went dead). now im still getting the MAF code. whats the problem? i DID put in a cold air intake if that has anything to do with it, but i dont see why it would. after i replaced the MAF, im gettin better mileage but it still stutters and sometimes dies when i stop, and the oil light flashes on when it stutters. i changed the oil pressure switch like somebody told me, but the light still flashes and it stutters. what do i do?

Sounds like an idle issue , Try cleaning out the injectors with some super tech injector cleaner , best stuff on the market. Make anything go away =) And you may need to check the if you have your cold air intake system hooked on tight enough , You may be getting air leaks BEHIND the MAF , That is if you got the full tube and silicone set up with filter. Also...You may want to have a shop look at the throttle body , You may be getting something there or something has already gotten in and is causing it to act up..I dunno , check the butterflies , see if they are tight =D. Not really an oldsmobile person until I got the calais. Most honda , dodge and subaru.