Went from the 45ish # injectors to 55# in my TBI. I adjusted the BPC for the injectors and could barely get it started. It starts better with the BPC at a higher value than with the value of 150 that I calculated it should be. Even when raising the value it still doesn't start as good as it did with the smaller ones. Once it does starts, the idle is very slow and takes a while to come up to the set idle speed.

Should I try bumping the Crank - Prime PW? Any suggestions would be appreciated.

EDIT:
just realized that the Injectors that I thought were 55# may not be. The injectors I got were from a 82, 5.0 Camaro. I see that the part number for the Camaro injectors are NOT the same part number for the 5.0 Liter trucks from the late 80's and early 90's. Is there a difference in the flow rate of the Camaro and the truck injectors? Is there anything different electrically about them?

 

Unless you grabbed the x-fire injectors from two different vehicles you shouldn't use them. The front & rear injectors have different flow rates. By two vehicles can grab the two fronts or the two rears and use them together.

I don't know what their flow rate is. They should also have different parts numbers for the front & rears.

RBob.