Important Chirping Pump Update...

[5AD86D]

I just spoke to a lead Toyota field tech here about the high pressure pump and he told me that they are aware of the lastest number SU003-05176 not getting the results they wanted. He says they are releasing a new (3rd) pump that will contain a better kind of diaphram of some sort to correct the issue. At the moment there is no ETA though so just be patient.

[Razz]

smoke and mirrors?

[5AD86D]

Originally Posted by Razz

smoke and mirrors?

Not to worry, I'm a very reliable source for this info sir. Thing i'm waiting to find out is if this new pump will be a completely different number or if it will be the same part number just redone. Hope to know soon because I plan to have it done on my car as well.

[Tromatic]

Heh. There was a reason I was willing to wait before I asked for a new pump.

[driftartist]

spoke with my main dude at toyota. toyota said they have the 3rd pump back ordered till first week of jan but that it still might not fully resolve the issue. it is still uncertain

[kuhlka]

Hmmm... Maybe this is why most cars have the fuel pump in the fuel tank? (to keep it cool and quiet)

[cnk]

Originally Posted by kuhlka

Hmmm... Maybe this is why most cars have the fuel pump in the fuel tank? (to keep it cool and quiet)

There is a fuel pump in the tank already. There is also one on top of the engine which is the HPFP and the cause of the crickets/chirping.

[kuhlka]

Originally Posted by cnk

There is a fuel pump in the tank already. There is also one on top of the engine which is the HPFP and the cause of the crickets/chirping.

Exactly my point. It's not in the fuel tank staying nice and cool, with any odd sounds muffled by the fuel.

[cnk]

Originally Posted by kuhlka

Exactly my point. It's not in the fuel tank staying nice and cool, with any odd sounds muffled by the fuel.

You can blame Toyota for their D4S system. The only reason the HPFP is there is for the DI system. However, keeping the HPFP cool probably has nothing to do with reducing the crickets because if that were the case, there should be fewer complaints when the temps drop.

[humfrz]

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



humfrz

[Sportington]

I got a call from my dealer today that the 3rd gen HPFP is available and made an appointment to bring car in for its 2nd pump. I will want to see the part for sure.

[fistpoint]

Originally Posted by Tromatic

Heh. There was a reason I was willing to wait before I asked for a new pump.

Me too. The possibility of having my local dealers being the "we only fix it once" type, is something I don't want to deal with.

Originally Posted by Sportington

I got a call from my dealer today that the 3rd gen HPFP is available and made an appointment to bring car in for its 2nd pump. I will want to see the part for sure.

Wouldn't that be the one the OP said doesn't work and they are aware of not working?

How many pumps are we on? Are you guys counting the original pump as #1 or is the 1st replacement pump considered #1?

[Tromatic]

Originally Posted by fistpoint

How many pumps are we on? Are you guys counting the original pump as #1 or is the 1st replacement pump considered #1?

Depends on how you count it. Original pump, then came the second pump, and IIRC there was a mod to that one after it chirped. This will be pump four, I think. Noting wrong with mine, other than it chirps every now and then. I'll keep that one until a proven fix is out.

[strat61caster]

Originally Posted by cnk

You can blame Toyota for their D4S system. The only reason the HPFP is there is for the DI system. However, keeping the HPFP cool probably has nothing to do with reducing the crickets because if that were the case, there should be fewer complaints when the temps drop.

There has to be a pump close to the engine to maintain the 3,000+ psi required for current direct injection systems. This isn't a Toyota thing, many manufacturers have similar systems, and to be fair none of Toyota's systems sold in the 86 have failed at all. Compare to someone like BMW?

http://jalopnik.com/5673591/how-fans...ulty-fuel-pump

Porsche?

http://forums.rennlist.com/rennforum...p-failure.html

Toyota's D4-S system is tried and tested and has been in production for 7 years, I can't believe people keep calling it shit when the alternative is Subaru's DI system, oh wait they didn't have one production ready until Toyota shared the plans for D4-S.

We persevered but one year into the project and both sides could see that while we had a sports car, it still needed a good power level of 100bhp per litre and also an environmental target of a maximum of 160g/km of carbon dioxide emissions. With the Subaru flat four as it was we could get one and not the other. If we wanted 160g/km we only got 60bhp per litre, which meant 120bhp in total; not enough.

...

What’s more Subaru’s reaction was a bolt from the blue. ‘Not over my dead body,’ was their reaction. The rationale was their previous experience with direct injection and the many problems that had occurred. The chief executive officer of engine development had previously been the head of the introduction of direct injection at Subaru and was very anti the idea.

http://www.toyoheadquarters.com/thre...-scion-frs.43/

Originally Posted by humfrz

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



humfrz

The most recent TSB states that the new pump has 'revised insulation' to quiet the noise. It didn't work.

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