2013 Subaru BRZ Limited Grasshopper noise?

[FRS_FIEND]

I still have no idea what you guys are hearing lol I never hear my frs' pump make any noises that calls for me being super irritated lol i guess i got lucky ? lol 5600~ mi. 91 octane no ethanol

[swpbrz]

Originally Posted by FRS_FIEND

I still have no idea what you guys are hearing lol I never hear my frs' pump make any noises that calls for me being super irritated lol i guess i got lucky ? lol 5600~ mi. 91 octane no ethanol

Its the ethanol or other additives places that use ethanol are likely to use.

[Gabster]

Originally Posted by Marchy

You may need to cycle a tank of it to take effect.

Yep, took me 2.5 tanks to get rid of them.

[extrashaky]

Originally Posted by Marchy

You may need to cycle a tank of it to take effect.

But that doesn't make sense to me, because the few times I've gotten a good tank of E10 that gave me no crickets, the change was almost immediate. I filled up with E10 from a Chevron station over in New Iberia, LA and heard the crickets die when I cranked the car and the new gas hit the HPFP. The exact same thing happened again at a Marathon station in lower Alabama. If the problem is cavitation in the fuel, filling the car with a full tank of fuel that resists the cavitation problem should cause an immediate change as soon as the new fuel reaches the pump. The E0 produced no change whatsoever.

I am still convinced that ethanol has nothing to do with it, especially since some E85 users are still reporting that their crickets go away when they switch over. I still think it's the additive package. When you get ethanol-free gas, it's coming from a different distribution system from regular tier 1 gas, and I think it lacks the additives in the tier 1 gas that contribute to the cavitation.

And speaking of cavitation, if that's where the pressure behind the plunger in the HPFP drops low enough to pull gas bubbles out of the fuel, could that be eliminated mechanically by raising the pressure behind the HPFP? I'm wondering if replacing the other fuel pump with a higher flowing model might pump enough pressure into the HPFP that the cavitation doesn't happen. Is anybody here running an aftermarket fuel pump under the rear seat?

[carbonBLUE]

i dont see what the problem is. 50k miles on my OEM crickets. Never had the crickets replaced or serviced. car preforms just fine.