Falcon foibles

SOUNDS as if you may have fuel vaporisation, particularly if Ford has replaced the fuel rail. There's nothing to suggest a widespread problem. It could be the outlets you buy your fuel from. If you suspect a problem, buy from a large outlet of one of the major companies. Because they will have a high turnover, there is less chance of getting contaminated fuel. The major companies don't use ethanol, which can vaporise faster and lead to the sort of problem you have. Also try PULP. Most PULPs have more detergent which will help keep your fuel system clean. Using a fuel such as Mobil Synergy 8000 will give you better performance and fuel consumption to offset the cost.