yes, there is a code reader but it is a scan tool that most shops have. it is not a free service.
how did you check the sensors?? it sounds like low fuel pressure but you need someone to put a pressure gauge on it to verify.
Another thought to supplement Roy is that you could have an exhaust restriction. Check for a possible restricted catalytic converter.
The system is old EEC-IV Ford processor strategy. There is a Ford specific diagnostic connector that plugs in under the hood. Indeed - how did you check the sensors? I have to say that this is not the easiest vehicle or system to pull a datastream or valid parameters for...so...get in touch with a solid tech with good know how and diagnostic equipment. Good luck.