Originally Posted by
austinbarrylee
Getting frustrated. I cant get my AEM AFR dialed in 14.7 cruising. I am reading 15.2 in 5th gear. I finally got a new o2 sensor. I have changed pressure to 68 from 65 and still cant achieve the 14.7. WOT have not because I dont want to mess anything up. I can to dial in so I can WOT. Im tired of driving like grandma. I LOVE SPEED!!!
In closed loop, the fuel pressure doesn't matter. The ME is going to adjust fuel trims to accomplish the set AFR in the closed loop fuel map. There is nothing wrong with a 15.2:1 AFR at cruise. If you log LTFT's, you will see how much fuel is being pulled at that RPM and load range to accomplish the target AFR.
Does anyone, other than me, run rising rate fuel pressure?