just installed ford 24# injectors & custom fastchip, now it runs like a pig! Was running 45psi and lowered it to thirty five. do I need to change timing? I'm new at this. any tips appreciated!! papasmurf

 

Set the F/P to 42, or whatever Ford rates their injectors at, then the injector constant to 24, and begin tuning.

You'll probably have to modify the VE table(s), and timing.

The short pulse width linearity can change enough between brands that you have to adjust the VE table to account for the difference.

Using a scanner will tell you where your at as far as MAP and rpm, then start changing the fuel in those areas that you can watch the BLs to see where you are reference to 14.7.