For the past 4 days at least once a day my engine has been dying. Just sitting at stop lights all of a sudden just dies but starts back up immediately. Took it to a mechanic to check the battery. They checked Battery, Starter, Alternator and all checked out fine everything passed. Also my engine is 5.4 with an Interstate Battery in case it matters. Any clue what else to look for and anything to replace. Thanks for any input its greatly appreciated.