Occurs about 5 p.m. and on very hot days, so far. When tester is touched to fuse or wires wiggled in the back access panel, it starts and then won't act up againuntil 1-2 weeks later. It's always something different that makes it start. 2 hours of diagnostics at the dealership didn't get me anywhere. The fuel pump was replaced about a year ago. Once it starts, it runs well and starts again without problems for about 2 weeks. My neighbor says it's haunted.