I know rail pressure is a common question around here, but I searched and didn't see this specific issue addressed. When I do consecutive WOT datalogs in 3rd gear, the rail pressure will drop across the board on each consecutive run. So on the first run in may peak at 2300psi and drop as low as 1750psi, on the second run it may peak at 1900psi and drop as low as 1550psi, on the third run it may peak at 1850psi and drop as low as 1475psi. Then if I come back and do 3 more runs a few weeks later, it'll do the exact same thing. Each consecutive run it just gets lower across the board. Is this normal?
The car is FBO with Pure DDs and 450 walbro in the tank running an "E30" mix. Trying to decide if maybe this is a failing HPFP or just to be expected.
This actually leads to a bonus question as well! So when I say "E30", I put it into quotations for 2 reasons:
The car is FBO with Pure DDs and 450 walbro in the tank running an "E30" mix. Trying to decide if maybe this is a failing HPFP or just to be expected.
This actually leads to a bonus question as well! So when I say "E30", I put it into quotations for 2 reasons:
- It's not actually E30, the Motiv Flex fuel says it's E30 because it's reading incorrectly
- I'm not actually tuned for E30 yet, but I do have an the Flex Fuel box checked in MHD