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