I just upgraded from 19# to 24# injectors as well as added an adjustable fuel pressure regulator. My BLMs were ok(well maybe close is better here) with the old set up but I can't seam to get them back now. I have been changing the injector size in the bin. The BLMs are low and the car is running rich.
Do I just need to keep going up with the injector size or do I need to change something else? I have the 165 ECM.

 

Did you set your fuel pressure to match the new injectors' stated rating (Ex. SVO 24# @ 39 psi)? If you have the wrong pressure, then maybe your are actually flowing higher then what you have set as the constant. For instance, if a 24# injector rated at 39 psi was set at 43.5 psi, then it would flow like a 25.3# injector.

Also, not sure how you are programming, but I made changes for two weeks and learned that nothing changed because I was not offsetting the start address when burning the chip (flash chip).

Ed

 

Starting address is set right, I had that problem when I first started doing my own chips.
I am running around 50 psi fuel pressure and I do understand that changes the flow rate I was just making sure that changing the injector size was only thing I needed to change in the chip to get it back close again.

 

use the MAF scalers to adjust fuel globally in a 6E mask. then use the MAF tables themselves to fine tune your idle and misc. rich lean spots that always pop up.
i would drop the fuel pressure to 46(less stress on the fuel pump=longer life), set the correct flow rate for the injectors, and move the scalers down 2 notches in each table and see where that puts you. move them more if your closer to the 108 end of rich.