Engine idle chirping (cricket) noise poll.

[SirBrass]

Originally Posted by Velutha

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?!

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.

[Muskokan]

Originally Posted by SirBrass

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.

Cavitation? Ethonal is causing air in the pumps? Source?

[SirBrass]

I'm probably using the term incorrectly.

But in short, ethanol helps produce the chirps.

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

[Vis101]

@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?

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[FrSnake]

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

[SirBrass]

Originally Posted by FrSnake

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

Are you talking crickets "period" or overly loud crickets?

Try sound insulating your high pressure fuel pump.

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

[FrSnake]

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..

[SirBrass]

Originally Posted by FrSnake

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..

Well, there are tsb's for it. It's not a reliability issue, just noise, so if the sound is dampened by sound insulation around it should help. The luxury DI cars have sound insulation around their hpfp's b/c of crickets. We don't b/c "minimalist".

If it's still overly loud, get it replaced again under warranty.

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

[LD]

I have E85 Flex & Innovate SC and I replaced fuel pump with Deatschwerks E85 pump (seems like not the pump?). I have used ONLY E85 for months, I never use gas or add gas just E85 which is really around E79 (Flex sensor/reader).

This throws off some of the theories, I live in S. CA and immediately (no "boiling") get crickets when I start the car, then a mile down the road they're gone. It also seems to be when it's cooler here (60 degrees instead of 70 for instance).

[SirBrass]

It's not just the environment which produces heat. Alcohol has a low boiling point & the high pressure of the hpfp sub system will also increase the heat.

E85 definitely increases crickets b/c it has much higher ethanol content than e10 pump gas. Of course you've got crickets.

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

[extrashaky]

Originally Posted by SirBrass

But in short, ethanol helps produce the chirps.

I do not believe it. We have had way too many people here report that they are using ethanol-free gasoline and still have crickets. We have also had people using E85 report that they do not have crickets. In fact, we have had people report that when they went to E85, the crickets stopped.

It's hard for me to get anything other than E10. I personally have used E10 fuel that caused really loud crickets and other E10 fuel that had no crickets at all. If ethanol were the problem, I should have them all the time, and at similar volume.

Instead, I have had no crickets, filled up and immediately heard them. I have also had loud crickets, filled up and immediately heard them disappear. I am therefore convinced that it's not the ethanol, but the additive packages in the gasoline blends from different stations, since different brands of E10 give different results.

[SirBrass]

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.

[strat61caster]

Originally Posted by SirBrass

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.

Huh, mine were thoroughly gone by the 10k mark, 15k later haven't heard them since.

Been on a variety of 91 octane E10, usually grab the cheap or convenient stuff. This is a pre green dot pump that I've had since day one.

Ethanol shouldn't be the cause, ethanol has been in US fuel for nearly 20 years, it's a design parameter Toyota knew about before many people here can drive. It isn't the ethanol's fault it's Toyobaru's. This isn't a surprise development to their engineering team, they tested the car here and decided the noise was not harmful 2+ years ago.

[Vis101]

Hopefully the new Consumer Report rating will kick the management hard enough to find a solution. I try to accept the crickets but regardless of the fact that they do not impact performance, it is a persistent annoyance. Someone made the prefect analogy earlier about a seeing a beautiful woman and then suddenly hearing her smacking chewing gum loudly and how much of a turn off that would be. We need Toyota and Subaru to take the gum away from her. If not them, then hopefully someone who can seize the opportunity, profit from our annoyance and bring an end to this 400+ page thread.


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