I have looked but can't really find the answer. What is a normal drop in fuel rail pressure on an 04 with a 2.8 pulley. Or should there not be a drop at all. Example. Wot pull as soon as I hit the throttle I see a lean spike for a hundredth of a second then as it starts to come down I see the rail pressure drop to around 25. But this is for just a hundredth of a second then both plane out, the pressure goes up and AFR goes back to 11.5. thanks in advance