first of all when i first start it. It starts and runs fine smooth. Then all of a sudden it will misfire then sometimes stall. Then u restart sometimes it runs smooth again or misfires again. Seems like.and then not start for couple seconds then u wait a minute then it starts. Maybe coils? Maybe plugged fuel filter? And sometimes when u go to start it. U will step on gas and it will stall it maybe leaking fuel injectors. Please help. Im getting no codes are coming up. The check engine comes on when it misfires but goes off when it doesnt. Please help