My question is closely related to one about a Jag dying at low RPM, but is slightly different because it only occurs after refueling and because the problem persists after cleaning the throttle body, as suggested by the answers.
The car is a 2006 Chrysler 300C, which occasionally dies at low RPM (e.g. at a stop sign). I can feel the RPM drop suddenly and see it on the tach; if they dip too low the engine dies. If I notice it fast enough I can rev the engine to keep it going. Sometimes the engine RPM will stutter while driving as well, but the engine will typically recover if the RPMs are high enough when it happens.
The problem only occurs shortly after filling up with gas and seems to be more likely the lower the tank was at fill-up, but I don't have much data on that. The problem occurs regardless of octane (87 and 89 are both approved for the Hemi engine) and subsides after several miles of driving, especially if it is not stop-and-go.
Several things have been done (some were just routine maintenance), but none have fixed the problem:
- small leak in transmission fixed
- throttle body cleaned
- induction system serviced
- spark plugs replaced
- replaced fuel filter
- flushed fuel system
- checked out timing sensor