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It likely won't have any fuel pressure monitoring capability and that's why it won't throw a code.
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In addition there may be code(s) thrown for the O2 SENSOR(s).
All of this is shiat simple. The vehicle has an ECM. You read what it has recorded.
If it points to a fuel pressure/delivery volume problem, you use a fuel pressure gauge.
The FORD WSM for the particular vehicle has a COMPLETE DIAGNOSTIC SEQUENCE that gives step by step instructions to diagnose a problem(s).
The TECH uses this, pulls codes, checks for any applicable TSB's and goes into diagnostics from there.
Hosting guessing games on message boards ain't gonna get it.
Pointing a PARTS CANNON at it and buying CHI-COM parts ain't gonna get it.