engine problems

Ok so i bought a 2001 Towncar from facebook and it was fine. After 1 hour of driving every light on the dash cut on exect oil light and battery light . There was vacuum code narrowed it down to the maf and repaired it. Then a few days later the alternator went out and i replaced that but after...

Please tell me if you're aware of issues like the ones I'm having ... my engine loses power while driving and the engine misses and races. In neutral, if I give it gas and then take my foot off the gas, the engine abnormally continues to idle at a high rpm for a while. Have any of you...