NHTSA Complaint #11143761 — 2010 NISSAN ALTIMA

I HAVE BEEN HAVING PROBLEMS WITH VEHICLE BUCKING TOOK TO NISSAN DEALER WAS TOLD 1 IGNITION COIL AND SPARK PLUGS PAID TO HAVE THEM REPLACED BUT ALSO HAD MENTIONED IT SMELT LIKE RAW EGGS TO THE DEALER. A FEW MONTHS LATER SAME THING TOOK TO DEALER SAID ANOTHER IGNITION COIL I APPROVED FOR THEM TO REPLACE THE REMAINING 3 IGNITION COILS SO I WOULDN'T HAVE THIS PROBLEM AGAIN AND AGAIN I TOLD THEM THAT IT SMELT LIKE RAW EGGS. NOW THE SERVICE ENGINE SOON LIGHT IS ON AND THE CODE IS FOR THE CATALYTIC CONVERTOR. WAS TOLD THAT THE EXTENDED WARRANTY WENT OUT IN APRIL. I WOULD LIKE SOME ASSISTANCE WITH THIS. ALL THE ISSUES WAS WHEN DRIVING AT BOTH HWY SPEEDS AND CITY SPEEDS