Quote Originally Posted by 231FUN View Post
Did you look up what stock fuel pressure with stock injectors is supposed to be at idle?
70 psi seems high to me.
The fuel rail with the circle was an update, like a small resevoir to help keep rail pressure more constant if I recall correctly.
Well I heard 70 was normal. But I also heard 43 at idle was ideal. So I'm not positive which one is right lol. And thats what I heard as well about it being used to help keep pressure more constant.

Quote Originally Posted by Fivefingerdeathpunch View Post
That fuel rail is from like a 97 model year, I don't know exactly what it does but it just holds more fuel there and likely does something to fuel pressure.

70 psi of fuel pressure sounds really high also. Not sure if rail related, swap your 99 fuel rail on and see if anything changes.

See what the injector duty cycle is, injector ms doesnt always mean they are running static. If you are still only at 75-85% duty cycle, you are not running static with it at 18ms.

And seeing -22 LTFT while driving isnt right, it should not be trying to always take away that much fuel.
That rail is from like a 97? It came on a stock engine straight out of an 04 Impala SS Indy 500 edition. My 99 rail didn't have that extra circle piece. I'll have to get home to replace the fuel rail sometime.
And 18ms I am understanding is static on stock injectors/pump? And the log taken of me driving showed that as soon as it hit 18ms and was commanding -12.5LTFT it started running lean.
I find it weird that the car is telling the injectors to open longer (more fuel), but then see's it's rich (pulls fuel), then can't keep up with command. Like it is confused lol