Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec Put on my SVT UIM, with stock throttle body.

You are really gonna have to fix the fuel problem first. The mixture is all jacked up and if you are running too rich that will kill throttle response as well. You have no way to tell right now what mod is doing good/bad.
Your ghetto fix is probably what is allowing the engine to pick up some power in the upper revs. NONE of it is probably being significantly affected by the SVT upper I would guess.

If you were to use some SVT 19# injectors then your problem might be greatly helped because the stock pcm may be able to pull enough fuel on them.
Honestly, I'd run your stock 17lb injectors if you can (if they are top feed) and then just slowly test it to see if you are pinging. Of course when you do that you remove the ghetto fix...though I can't see how that mod does anything for you anyway. If you just unhook and plug off the line the regulator will maintain 45psi. Sounds almost like you have it fixed for 55psi all the time and that would make it worse all the way around.

The damned best way is to chip the thing for use with 24's and leave everything else in the code alone, and stock! Then when you can afford to tune it you can screw with the other settings.