Miss fire

[Randall Garner]

Hello 98 4.6 changed coils, and plugs and wires. One wire at a time. And now it spits and sputters, won't rev above 2500 been fighting this for over 3 months. I'd like to drive this car before 24 ends

 

[RAU03MACH]

What brand of parts

 

[RAU03MACH]

Timing could be off

 

[07GtS197]

When did it start and what have you done to try and fix it other than replace the coils and wires?