2002 lincoln town car

Check for check engine codes

Thank you will do that the converter smells like eggs too think that would cause it,does advance auto and auto zone still check codes

Yes they do. I hope it's not the catalytic converter

it;s probably the spark plug or the wire need to be replace my car did the same I put the computer and told me it was the number 6 spark plug replace it and it stop doing that Auto Zone can check it for free and tell you.