Engine idle chirping (cricket) noise poll.

[OrbitalEllipses]

Originally Posted by Raven86

not sure if its the same noise, but when parked with the engine on it sounds kinda like ticking coming from the engine. I popped the hood and it seemed like it was coming from the belts. Is this normal/the noise ppl are talking about?

Originally Posted by Gen

That's normal and different than what is referenced here.

"ticking" can be two things: injectors or the valvetrain. Both considered normal noise a Subaru flat engine; they're known for being kinda noisy.

[sierra]

Originally Posted by mezdup

Louder than usual this morning. Uploaded a video for a friend and figured I'd post for people who can't reproduce the sound when showing somebody else.

Sent from HTC Rezound using Tapatalk 2

Thanks for the video.
Sounds like an old clonker that's been around the clock and needs new drive belts or a new motor. That's a real shame with your new pride and joy when the engine is its heart and should sound the part, smooth and quiet under the bonnet.

[sierra]

Originally Posted by mojojojo

So, I just got to work and it is back again, but not loud. I have driven about 20 miles with the a/c on and have 10% ethanol, but this tank did not use the lucas oil, but from my previous post it did not stop the chirp, but it did make it quieter. Well, I will keep you posted if it gets worse or not. I got another lucas oil that I could try next tank and see how that goes, or I might make the trip and get the ethanol free gas. Well have fun with your cars.

Which Lucas oil did you use?

[sierra]

Originally Posted by Fenrir

The sound coming from our cars is normal under standard operating conditions, and is not the result of a faulty part that will ultimately result in damage. It's just a noise.

It's been quite clearly established that this noise only happens when ethanol is in the fuel. How many posts do you need to see?
No ethanol quiet, E10 or E15 noisy.

So the HPFP isn't happy with ethanol going through it and when it gets hot there's not enough lubrication and it starts to complain. The noise is a result of high friction causing at least one part in the pump to run under extreme conditions it wasn't designed for. How long it can endure those conditions is currently unknown.

My educated opinion but I doubt it's far off the mark.

[mojojojo]

Originally Posted by sierra

Which Lucas oil did you use?

I used what was mentioned in the post earlier. I used the HI-Performance Upper Cylinder Lubricant and Injector Cleaner. I used one 5oz. with a full tank of gas 91 octane with 10% ethanol, but I am thinking after my next tank I am going to use the 91 that has no ethanol to see what might happen.

[sierra]

Originally Posted by mojojojo

I used what was mentioned in the post earlier. I used the HI-Performance Upper Cylinder Lubricant and Injector Cleaner. I used one 5oz. with a full tank of gas 91 octane with 10% ethanol, but I am thinking after my next tank I am going to use the 91 that has no ethanol to see what might happen.

You would think that would work when a 1/3 of that quantity of 2T works?

If you can get ethanol free 91 octane that should also work but isn't it supposed to run on 93 octane? Our equivalent here is 98 octane.

[blu_]

In some areas of the US 91 is premium.

[mojojojo]

Yeah, unfortunately here in Colorado it is 91 and if I go to the race track and I think there is one more place besides the track I can get 93. The track is far from where I live and would be pointless to get it all the time.

[sierra]

Originally Posted by blu_

In some areas of the US 91 is premium.

Sounds the same as our premium 95 RON.
High octane is 98 RON.

I'm sure running on US 91 is fine as the knock sensors will just retard the ignition timing and the only penalty will be lower power and mpg. It might be hard to pick, hopefully?

In Oz the premium cost above standard is nearly 9% more and nearly 13% on top of standard for the high octane brew it's designed for! It's a shame the ethanol is causing problems because it should be a cheap way to get the high octane needed.
Hopefully they will soon modify the pump to suit this fuel.

[Pscylo]

There aren't any 0 Ethanol stations within several hours of me it looks like.

[OrbitalEllipses]

Originally Posted by blu_

In some areas of the US 91 is premium.

Usually higher elevation states.

[Fenrir]

Originally Posted by sierra

It's been quite clearly established that this noise only happens when ethanol is in the fuel. How many posts do you need to see?
No ethanol quiet, E10 or E15 noisy.

So the HPFP isn't happy with ethanol going through it and when it gets hot there's not enough lubrication and it starts to complain. The noise is a result of high friction causing at least one part in the pump to run under extreme conditions it wasn't designed for. How long it can endure those conditions is currently unknown.

My educated opinion but I doubt it's far off the mark.

I've been using ethanol free fuel since I got the car and it makes the same noise. All the "testing" at this point is speculation at best. It's probably the ethanol making it chirp, and it's possible the gas station I use is lying about their fuel contents, but it's still inconclusive at best. Every other direct-injected car I've come across makes the same noise. My speed3 sure did and that ran for 60k miles on the stock fuel pump with 0 issues. Took it apart when I replaced it with a higher-flowing pump and there was no evidence of increased wear or damage.

But whatever, people will come to their own conclusions based on their own circumstantial evidence. Funny how you don't see any professional mechanics or tuning shops commenting? They know better

[sierra]

Originally Posted by Fenrir

I've been using ethanol free fuel since I got the car and it makes the same noise. All the "testing" at this point is speculation at best. It's probably the ethanol making it chirp, and it's possible the gas station I use is lying about their fuel contents, but it's still inconclusive at best. Every other direct-injected car I've come across makes the same noise. My speed3 sure did and that ran for 60k miles on the stock fuel pump with 0 issues. Took it apart when I replaced it with a higher-flowing pump and there was no evidence of increased wear or damage.

But whatever, people will come to their own conclusions based on their own circumstantial evidence. Funny how you don't see any professional mechanics or tuning shops commenting? They know better

You make broad statements that make no sense when compared to the large amount of evidence posted on this forum.

Your conclusion is in the same category.



Why have many pumps already been replaced in attempts to shut the chirping up if it's normal?
Why does a tiny amount of fuel lubricant stop the noise instantly?

Here's a bit more taken from a report carried out by Orbital Eng. in Perth WA

http://www.environment.gov.au/atmosp...assessment.pdf

Potential causes of failure specific to E20 fuel, in order of significance, were found
to be the following:
• Material degradation
• Gumming
• Lubrication deficiency
• Altered combustion
• Fuel properties

[Pscylo]

But the Title of that report is:

A Technical Assessment of
E10 and E20 Petrol Ethanol Blends Applied to
Non-Automotive Engines.

Last I checked, this is indeed an automotive engine....not saying it doesn't have some relevant points...just sayin