Anyone have recommendations? We’ve taken it to run a diagnostic twice, didn’t show any problems and it didn’t do it for them either time. It’s not started 3 times this week alone. Seems like it is usually when it’s been turned off for a short time, but has also been sitting for hours too and wouldn't start. It’s under warranty still and have an appointment for a third trip to find the problem. Can someone tell me what to have them look for? It’s actually my 16 year old car and it’s stressing her out and us too leaving her stranded so often.