So today my moms car when making a left turn to turn from one street onto another it just shut off. No stumble just off. So we had a few minutes before my doctors appointment so we drove around and when turning left into the parking lot at the doctors it died again. Then in the way home the idle when sitting would surge a little. Finally it through a pending code p0300. So I looked over everything obvious. There's no vacuum leaks spark plugs are 6 months old she always get gas at the same bp station. The throttle body had very little carbon as well. I know some of the older focuses had fuel pump issues not sure if this year still does. I can't easily check fuel pressure as there is no shrader valve so I haven't gotten a chance to do that yet. But when it's fine it's fine . She drove it about 10 miles home and said it never acted up. Any thoughts? Or anything in general I should check?