Welcome along Richard. Never heard of that one. Sometimes difficult to start when the engine is hot, high underbonnet temps, vapour in the fuel rails but various solutions available. Engines are pretty bullet proof and lots of info on the Mustang 2V 4.6 SOHC.
Get your questionnaire back to Tim to get full membership. Lots to read. What are the last three digits of your VIN?

Nich.