1998 Grand Prix 3800 GT. Sometimes after the traction control is activated the engine seems to say in traction control mode. It runs horrible/stumbles and the exhaust smells really bad. After a couple of ignition cycles or a long drive then it goes back to normal. It doesn't happen every time the traction control is activated, only some of the time. It seems like the engine stays in traction control mode. It happened last year and now that we just started getting snow it is happening again this winter. Does anyone have any clues?
