My car was diagnosed with a bad Mass air sensor after check light had appeared. I replaced the mass air sensor myself, after trying to clean the original with no success. Now that it has a new one it still continues to stall. Once you shut off the car and/or when it stalls while driving, it takes anywhere from 15 to 30 minutes to restart. Check engine light is no longer on but the problem is. I NEED HELP. Somebody, anybody please offer some insight.