engine quits at highway speed about once a week-no warning or shutter, just off. on 1999 Chrysler Sebring

will restart after coasting to stop, not while coasting in neutral. no engine codes. A while back (1-2 months),it gave code for "multiple cylinder misfire" but was running fine. starts and runs great otherwise. good fuel economy (28-30 hwy).

Asked by for the 1999 Chrysler Sebring
seek diag and est there is something wrong poss wiring connection or bad ground