Fuel pressure drop. why?

[bazeng]

Hi All,

My fuel pressure has dropped recently. It was originally set at 42psi without vac.

The only change recently is going to e10 / united 100ron.

Is 10 percent ethanol enough to start the cleaning process?


The pressure is now 35psi without vac.


I'll be pulling the fuel filter and seeing if it is gunked up. I'll also inspect the Walbro sock also. Mixtures seem o k still.

Opinions?
experiences on e10?

 

[DOUGMO]

i used to run e10 - 100 octane in mine, I had a bit of gunk come out but not much, it definately cleans things more than 98