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When at constant speed I notice a slight thump. Almost as if for a split second the car lost fuel to the engine then kicks back in. It does not register on the instruments. Also at lower speeds it can get shaky especially when decelerating. Taking it to the dealer Monday. Any thoughts?

closed as too broad by DucatiKiller, Pᴀᴜʟsᴛᴇʀ2, Zaid, Fred Wilson, Nick C Jan 5 '16 at 13:15

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Is this a constant or intermittent "thump"? What speed does it register? Have you had any work done to your car lately? Has it just come about (as in all of a sudden), or has it gotten worse over time? – Pᴀᴜʟsᴛᴇʀ2 Sep 5 '15 at 16:09
  • Could it be something not engine run related? I'm thinking engine or transmission mounts. They tend to thump when the rubber rots out. – kmarsh Jan 4 '16 at 19:45
  • OP never responded to initial questions. I'm voting to close this as a result. Too broad. – DucatiKiller Jan 5 '16 at 0:25