EEC--IV is OBD 1, EEC-V(1996 and up) is OBD 2
Codes 121 and 122 both say TPS(throttle position sensor) is having a problem or it's wiring is.
TPS is easy to test with OHM meter and then with Volt meter to see if wiring or sensor is the problem.
If both test fine then Computer is the problem.
Google: test ford TPS
TPS sensor is the same on a 2.3l or 5.0l, it is just a variable resistor, like a volume control or light dimmer
224 is an ICM(ignition control module) fault
Easy to test these as well, many auto parts stores have testers and will test these free of charge.
New parts do not mean "working parts", just FYI, welcome to mass produced cheap parts, lol
This is why it is better to test a part first, confirm it is bad, before replacing with un-tested part, because that is what "new" means now
New = never been tested
We demand cheaper parts, so we are given cheaper parts, they slap a warranty on it and YOU are now the Quality Control department, they happily replace a defective part under warranty but it is a real PITA when you expect it to be working, so you chase your tail for a few hours and then discovery the "new" part is bad, lol.
Last edited by RonD; 11-08-2014 at 04:45 PM.