my car runs rough tha tha shop said it was a emission sensor on 2001 Lincoln LS

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Since I took it to tha shop I found a vacum leak . Idels pretty good in park until u put it in gear then it misses like crazy an it cuts out around 50 through 65mph bout to fix tha vac leak if that doesnt fix it what else would cause the problem

(2) Answers
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