Important Chirping Pump Update...

[strat61caster]

Originally Posted by cnk

My point is that if the engine only ran port injection, there would be no need for the hpfp.

I think you missed the point of my post, without DI Tada claims they could only get 120 hp out of the 2.0L boxer with Subaru and that D4-S is far from crappy with only a minority (who predominantly track and mod) suffering failures of the DI seals. A funny noise is just a funny noise, it bothers some but not all.

[cnk]

Originally Posted by strat61caster

I think you missed the point of my post, without DI Tada claims they could only get 120 hp out of the 2.0L boxer with Subaru and that D4-S is far from crappy with only a minority (who predominantly track and mod) suffering failures of the DI seals. A funny noise is just a funny noise, it bothers some but not all.

I understand your point. My point is that Toyota failed in their design/QC of the HPFP for their implementation of D4S in the twins as evidenced by the IS350/GS350 which do not chirp. The fact that they are on their 3rd revision of the pump indicates that they still are making blind attempts at resolving the issue.

[strat61caster]

Originally Posted by cnk

Toyota failed in their design/QC of the HPFP for their implementation of D4S in the twins as evidenced by the IS350/GS350 which do not chirp.

Ah, see I don't consider the 'chirp' a failure. I consider a (so far) reliable 200 hp 2.0L boxer that gets good gas mileage a success. Agree to disagree, cheers.

[cnk]

Originally Posted by strat61caster

Ah, see I don't consider the 'chirp' a failure. I consider a (so far) reliable 200 hp 2.0L boxer that gets good gas mileage a success. Agree to disagree, cheers.

We will have to agree to disagree as you stated then. Considering NVH is a major component in car design these days, I would definitely consider the chirping a failure. It has not been proven to cause any issues thus far, but it is still a failure in my mind because of the added NVH that shouldn't be there. It's not like the STi where Subaru didn't put any sound deadening in the cabin and put disclaimers on their brochures when it was released. This chirping is not an intended design feature.

[autobrz]

Originally Posted by humfrz

I suppose someone has just tried wrapping that puppy up with multi-layers of Dynamat to shut it up ... ??

dynamat absorbs vibration to reduce noises produced by vibrating surfaces but does not block sound very well. some mass loaded vinyl will work better I think...

[kuhlka]

Originally Posted by cnk

Mine are consistent no matter what the temps. Once the engine is all warmed up, they manifest.

Same here. It's usually chirping like crazy by the time it's fully warmed up (temp gauge at ~50% mark). Aside from the obnoxious noise, the pump performs well enough. I'll be waiting for a confirmed long-term 'fix' before bothering Subaru about a replacement.

[jeebus]

Originally Posted by strat61caster

On my original pump, 17k miles, noise went away around 10k and I'm happy as a clam.

I'm on my original pump too. I got the noise around 1500 miles, it went away a few thousand miles later as well. However, it came back at 20k miles...now it's mostly gone again for the winter.

[fistpoint]

Originally Posted by cnk

We will have to agree to disagree as you stated then. Considering NVH is a major component in car design these days, I would definitely consider the chirping a failure.

You're damned right it counts as a failure.

I made the visual analogy long ago of the engineers all standing around the first time they fired it up and heard the crickets for themselves...they all looked around and began giving out "hi fives" to each other for what would only be considered an awesome sound that every owner would be proud to show off to their neighbor and other potential customers.

In reality, they probably cringed...likening the sound to that of an old, beat to shit engine that needs one or more belts replaced.

Nah, who am I kidding. They're quite proud of the noise the engine makes, that's why they keep making revised pumps that clearly cost zero money to redesign.

[Tromatic]

LOL at the haters, fuel-pump designers and fluid dynamics PhD's.

[FR-S Matt]

I told my service adviser to just give me another shot at the latest pump version again if they can. Waiting to hear info about a possible "another" revision to the current SU003-05176 pump but with the holidays around, might not get an answer till after New Years.

[5AD86D]

Originally Posted by FR-S Matt

I told my service adviser to just give me another shot at the latest pump version again if they can. Waiting to hear info about a possible "another" revision to the current SU003-05176 pump but with the holidays around, might not get an answer till after New Years.

I hope to know soon. After New Years is looking more and more likely.

[utekineir]

Woodpeckers in the engine bay are where it's at

[SteveGrillo]

I'm have a BRZ and had the chirp within maybe 5k miles. Subaru replaced the FI part, and it was great again, for a while. Now it's HORRIBLE (10K later).

The chirp happens under ALL loads from idle up to almost 2K RPM.

And after driving for a while, you can hear it stopped at lights etc, regardless of ambient temps.

But when it's hot out, MAN is it annoying and LOUD. It really sounds like a bad water pump or other metal-on-metal problem.

I'm embarrassed to drive up near anyone when it's chirping loudly.

So I for one am very VERY interested in a real fix to this.

Steve

[fistpoint]

Originally Posted by Tromatic

LOL at the haters, fuel-pump designers and fluid dynamics PhD's.

I can almost bet your life that most of the people telling us haters to shut it will be one of the first assholes lined up at their dealership when it's finally announced that a real working pump exists.