is that cricket noise??

[impossible]

Anyone have noise when you are stopping which the noise are similar as you haven't out in the right gear and cracking for maybe 1-3 seconds when it is idle?

only occur randomly when i stop for red light.

[Koa]

[enter your name here] to determine without a video

[impossible]

Originally Posted by Koa

[enter your name here] to determine without a video

is really hard to get the video as it happen randomly not constant... the situation is like when you are coming for a full stop and has just put the gear in neutral the cracking noise appear for 1-3 seconds. but it doesn't happen every time.

[Koa]

cricket noise is due to the HPFP during certain conditions when the car's ECU is in "idle" mode. If you have them, and start hearing them at a stop, they would continue to "chirp" until you begin cruising again

[impossible]

Originally Posted by Koa

cricket noise is due to the HPFP during certain conditions when the car's ECU is in "idle" mode. If you have them, and start hearing them at a stop, they would continue to "chirp" until you begin cruising again

Hmm it only occur when I am fully stop and hear some noise from the gearbox like haven't put in neutral so is not hpfp problem?

[vinh]

i just noticed a chirp again today and filmed it, is this it?
[ame="http://www.youtube.com/watch?v=-pSW_h2Yu5U"]Subaru brz engine chirp crickets - YouTube[/ame]

[Ultramaroon]

Originally Posted by impossible

is really hard to get the video as it happen randomly not constant... the situation is like when you are coming for a full stop and has just put the gear in neutral the cracking noise appear for 1-3 seconds. but it doesn't happen every time.

If you are at a full stop and heard it for a moment, can you make it happen again by slightly raising the engine rpm? Unless it's really hot out my crickets only chirp between 800-1100 rpm.

[Koa]

and ultra the problem seems to not be RPM range, but the type of mode our ECU is in. This guy explains it so much better:


Originally Posted by VitViper
http://www.mazdaspeedforums.org/foru...squeak-105223/

My work on the MS3 platform with the chirp/crickets under the hood.

If you take some time to datalog the twins and use some basic troubleshooting (check off the fact that it's a brand new car with less than 1k miles so the likelihood for a mechanical problem/bad HPFP is basically NIL), start looking into the software and note how the system operates.

Anywhere from 650 rpm to ~1300 rpm I can hear the chirp, and when it's chirping the ECU is in a mode that's targeting 4 MPa of fuel pressure (fixed setting). If you touch the throttle just enough to leave that mode and enter the normal pressure target "mode" (the ECU appears to operate in two modes, one when you're on the throttle, one when you're not), even with the revs in that same range, no chirp. And you'll also note a difference in fuel pressure target and actual fuel pressure.

Doesn't take a rocket scientist to put together.

Unfortunately I have not yet found the perfect solution to keep the ECU from going into this mode. I'm an ECUTek dealer so I need to have a chat with those "chaps" across the pond about this. There is a table in the ECU that is 2x2 and targets 4.0MPa, but it seems to do nothing for our idle issue, it's never used (tried changing it up and down).

Another thing that would be interesting to see is if our PRV is straight mechanical or some kind of electronically controlled unit -- I seem to think electronically as we have a huge range of fuel pressure operation (all the way to 20mpa, ~2900psi. Almost 2x higher than the MS3 platform). Just the way everything behaves leads me to believe it is electronic... but I haven't had the time to look yet.

Reference: http://www.ft86club.com/forums/showt...30#post2017930

[kch]

Originally Posted by vinh

i just noticed a chirp again today and filmed it, is this it?

Yes, that's the standard HPFP chirp that nearly all of us have

[Ultramaroon]

Originally Posted by Koa

Doesn't take a rocket scientist to put together.

Agreed! Thank you for an excellent heads-up. I purchased the open-source device a few months ago but have yet to plug it in. Knowing myself, once I go down that rabbit hole I'll never come back.

Mentioned to my wife this morning. "I don't own this car. It owns me."

[Koa]

@Ultramaroon all text after the "Originally Posted by.." was Viper's words, I just included the reference URL at the bottom hahaha.

He seems like a very smart dude and may have the answer to this problem given time and effort. Looks like he's solved similar problems in his endeavors in other platforms

[Ultramaroon]

Originally Posted by Koa

@Ultramaroon all text after the "Originally Posted by.." was Viper's words, I just included the reference URL at the bottom hahaha.

He seems like a very smart dude and may have the answer to this problem given time and effort. Looks like he's solved similar problems in his endeavors in other platforms

Oh yeah. Duh.

You're smart too. Standing on the shoulders of giants blah blah blah...

Me? well... I'm more of a window licker.

[Koa]

Originally Posted by Ultramaroon

Oh yeah. Duh.

You're smart too. Standing on the shoulders of giants blah blah blah...

Me? well... I'm more of a window licker.

Aphex Twin - Windowlicker

[ame="https://www.youtube.com/watch?v=UBS4Gi1y_nc"]Aphex Twin - Windowlicker (official video) 1080p HD - YouTube[/ame]

[Ultramaroon]

dats muh whip yo