My 05 STS will not start every 4th or 5th time. Battery shows 14.4 volts and is new as of Jan 2, 11. Lights, radio, all come on initially and it shows accesories active. I have to keep braking and hitting start until it finally begins clicking and will start the engine. After start, radio will not work until you shut it off and start again. I had it hooked to a computer analyzer yesterday and it showed no errors or problems. HELP!