hey everyone I just got a 1989 buick regal limited 2 door it's pretty sweet but It seems like its getting 2 much gas and whenever I put in gear before it runs for like15 minutes it stalls. I already know it needs new plugs would this effect this. Any ways I was just wondering if u guys had any suggestions to what this could be. Thx in advance for ur time and comments

something is wrong with your o2 sensor or your air sensor