Three times in the last month my engine has unexpectedly stalled at or near idle speed. The first time I was just coming into a parking stall still in gear and it just shut off. The second time I was in neutral with the engine idling and the third time it occured while in reverse backing into my yard. The engine was not at operating temp on all occasions yet I had been driving for 10 mins in temperate weather. Would this be some electrical problem?