PeMa

iTrader: (4)

Last summer I replaced my leaking stock injectors for a set of Ford pink top (D9B) injectors from FiveO. They were advertised as direct replacement 22lbs.

This summer I started using Datamaster tog log my car and found out that it was running really lean, BLM 150+. I upped the fuelpressure to 48-49psi and BLM dropped to 140+. Now I have tried a new chip with injector size set to 21lbs (stock setting 22.36lbs) and BLM are staying close to 128 (+-7) in all cells except 14 and 15 where it still were lean.
The next thing I did was to change to 20lbs injector constant and dropping fuel pressure to 43-44psi. The BLM stayed almost the same, it started to go a little rich on the higher cells, but thats better than a little lean, right?

These injectors are(/were) sold as 22lbs at FiveO, but wouldn't these findings suggest that they are more like 20lbs...

I know that many are using these injectors, am I the only only one with this problem?
I didn't even know i had a problem until I scanned it...


regards Per

S105.7

ford rates their injectors at 39psi. this may be part of the problem.

PeMa

iTrader: (4)

If they were rated 22lbs at 39.15 psi (Ford) then they would be MORE than 22 lbs at 43.5 psi (GM) and run rich, not lean..?


regards Per