I have been having problems starting my 04 tacoma after I have driven it and then let it sit for about 3-4 hours. I took it to the dealer friday and they let it sit for 4 hours and were able to recreate problem, although I have read on other threads that they usually cannot recreate problems. There is now a TSB #EG042-04 for 03-04 tacomas with the 5VZ-FE to replace the No. 2 wiring harness which basically relocates the ground for the starter and alternator. Truck goes back this week to get replaced. Bulletin was dated 9/20/04.