Originally Posted by eric6 (Post 1679426)

Has anyone that has these issues continually tried a little bottle of 2-stroke oil added to a full tank of gas? 3 oz. per tank has solved my issues.... hell if anyone is in the Phoenix area I'll give it to them for $3 bucks a bottle as I stocked up on the stuff. See if it fixes the issue... our gas is crap over here.

Originally Posted by xxthrillxx (Post 1679644)

The only awesome fix i made. is a LOUD Exhaust.... UEL+N1



Cant hear the crickets over the rumble muahahaha :thumbsup:

Originally Posted by Mooseknuckle44 (Post 1679647)

That only works when you're not stopped. Lol. I've got the N1 also but idleing the chirp wins.


Sent from my iPhone using Tapatalk

Originally Posted by xxthrillxx (Post 1679651)

Lol this is true... Louder radio?

Originally Posted by xxthrillxx (Post 1679644)

The only awesome fix i made. is a LOUD Exhaust.... UEL+N1

Cant hear the crickets over the rumble muahahaha :thumbsup:

Originally Posted by aghuman (Post 1679740)

Anyone notice a relationship between air temperature and chirping? I don't seem to have this issue in the cold, but it pops up occasionally when its above 10 degrees C outside, especially after a long drive.



Owned the car for a year now, started having the issue a few weeks ago. Was all clear 35,000km into it

Originally Posted by aghuman (Post 1679740)

Anyone notice a relationship between air temperature and chirping? I don't seem to have this issue in the cold, but it pops up occasionally when its above 10 degrees C outside, especially after a long drive.

Owned the car for a year now, started having the issue a few weeks ago. Was all clear 35,000km into it

Originally Posted by Mooseknuckle44 (Post 1679339)

Lmao. Chirping, historically, has sounded like and indicated a problem.
Imagine if no one on earth smacked their gum when chewing. Then one day you're sitting at the mall and somone walks past you smacking and popping as loud as they can. You're first reaction is not gonna be "dayum that's awesome". More like "WTF is wrong with them?!"
Most cars dont chirp. So it's annoying being the flashy sexy person that smacks and pops in public.
Just my opinion btw.


Sent from my iPhone using Tapatalk

Originally Posted by brianhj (Post 1694115)

That was a weird fucking analogy

Originally Posted by Velutha (Post 1694752)

I don't want to summon the crickets by saying this but I'm around 550 miles, ethanol-free fuel and nothing yet. I'm so scared of the crickets that every little sound I hear makes me panic...oh god, is that the chirp?!

Originally Posted by SirBrass (Post 1700616)

E-free gas you should be fine. The crickets partly come from cavitation due to ethanol in the gas.

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.

Originally Posted by FrSnake (Post 1700714)

Had the fuel pump replaced once with this issue... couple thousand miles later and its back...-_-

Originally Posted by FrSnake (Post 1700737)

Oh its overly loud, I would post a video but i haven't uploaded it to youtube yet... I'll do that soon though. I would love to insulate it, but i feel like the problem is back with a vengeance and just needs to be fixed again..

Originally Posted by SirBrass (Post 1700639)

But in short, ethanol helps produce the chirps.

Originally Posted by SirBrass (Post 1701153)

I'm limited to E10 only as well. I don't have crickets yet & I'm closing in on 10k. From what I've seen, if one's hpfp is going to get crickets, it'll be due to ethanol. Those that don't, don't.

Not sure why sometimes they stop, but the consensus I've seen has been that it's related to ethanol.

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.

Originally Posted by SirBrass (Post 1700615)

Got direct injection? Let me play you the song of my people.

Originally Posted by Vis101 (Post 1700674)

@SirBrass, I looked up the boiling temp of Ethanol and it is at a low 173*F, whereas petroleum is at 410*F ( http://www.engineeringtoolbox.com/bo...ses-d_155.html). What I believe you are sizing is that the Ethanol is boiling when it gets to the fuel pump, resulting in bubbles in the fuel. These bubbles interact with the fuel pump in such a way that we hear crickets. We would need to sample fuel and measure fuel temperature at the fuel pump to confirm this. Given that most people (including myself) only experience crickets one the car warms up, that lends some credibility to the theory. I am probably over simplifying things though.

Thoughts?

Sent from my HTCONE using Tapatalk

Originally Posted by HunterGreene (Post 1701994)

I lol'ed. Nicely done.



Not quite. Cavitation is different than boiling. Also, I would doubt that the fuel is warm enough at the pump to flash boil, or we would have major problems with our cars. Heating the fuel to engine temperature does take a little bit of time, and I would guess the amount of time that it spends in the fuel lines before being injected is not quite long enough.

Cavitation is much more likely the culprit (and I believe Toyota has already come to this conclusion). For those who haven't Googled it already, Cavitation is a process (usually in liquid) where pockets of low pressure are created when a solid body moves through it quickly (or vibrates quickly), creating turbulence. This creates isolated, short-lived vacuum "bubbles." If you think of a submarine, they have a speed limit at which they can move "silently," above which their prop creates cavitation, which creates a rushing water noise.

Our fuel pumps move at a relative high speed, which with the lighter ethanol in the fuel is more likely to cavitate, creating those temporary bubbles and ergo the chirps. Fortunately for us, those little vacuum bubbles are gone by the time the fuel gets to the injectors.

Sorry for the long-winded post, but I am a bit of a subject-matter expert, as cavitation due to vibration was part of my Bachelor's Thesis.

Originally Posted by Vis101 (Post 1702045)

The education is much appreciated. What do you suggest is the solution? If cavitation is the culprit, and yet we still need the pump to operate at its current rate with the ethanol fuel, it sounds like either they need to take on some CFD analysis to redesign the pump. That or just figure out a way to insulate the pump so we don't hear the crickets anymore. I won't mind abding a couple pounds to my BRZ in order to quiet the pump.

Sent from my HTCONE using Tapatalk

Originally Posted by HunterGreene (Post 1702102)

The cost effectiveness of redesigning a pump just to eliminate a nuisance noise isnt worth it. Toyota would rather just replace than bother with the costs associated with redesign. The pump works, this is just an annoying side effect. FR-SMatt had the alleged insulated pump, but he can still hear the crickets faintly.

I've gotten used to them, and now that I am starting to hear them in other cars, I think we're just going to have to get used to the new normal.

Originally Posted by BRZJunkie (Post 1707999)

I'm one of many who find the crickets totally unacceptable but... I can also lighten up occasionnally. SO... for those who don't have the crickets I found what you need for the infotainment.