Direct Injector Failure Poll

[OmarGC]

My car used to intake backfire during start up during cold starts, hasn't done it in a couple months though... Hmmm

[CSG Mike]

Originally Posted by AsianStyle

Oh, I guess I got confused because Rich @ Visconti stated "all Visconti Tuned Calibrations incorporate the latest factory-release patches made specifically to address and correct the issues with the direct injection system."

So, I thought all dealerships would have the same.

ECUTEK added timing retard into their transient tables.

[AsianStyle]

Originally Posted by CSG Mike

ECUTEK added timing retard into their transient tables.

Wow, that sucks. So, there really is no alternative currently except wait for toyota/subaru or get a third party tune.

[CSG Mike]

Originally Posted by AsianStyle

Wow, that sucks. So, there really is no alternative currently except wait for toyota/subaru or get a third party tune.

Correct.

Or, keep replacing DI seals.

[Jeff86]

I think it's funny the people who were blaming aftermarket tunes for the problem... it now being the only real way to solve the problem.

[CSG David]

Tuning your ECU fixes the software issues and prolongs the engine life, but gets engine warranty denied. Blown engine because of "abuse" but can be replicated readily like getting onto the freeway, also denies engine warranty...

[TemeCal]

Interesting numbers so far. Not very good for Subaru...

TOYOTA
1 out of 18 reported cases denied (5.5% denied)

SUBARU
4 of out 6 reported cases denied (66.6% denied)

[regal]

Originally Posted by CSG David

Tuning your ECU fixes the software issues and prolongs the engine life, but gets engine warranty denied. Blown engine because of "abuse" but can be replicated readily like getting onto the freeway, also denies engine warranty...

But aren't you leary of the tuners claiming Hp gains, I mean this engine is already stretched to its limits?

Originally Posted by TemeCal

Interesting numbers so far. Not very good for Subaru...

TOYOTA
1 out of 18 reported cases denied (5.5% denied)

SUBARU
4 of out 6 reported cases denied (66.6% denied)

Subaru has a terrible reputation in dealing with these sorts of issues that will only affect the majority of owners after 60k. They've done their engineering and know that these engines won't blow up until 60-100k miles under normal driving. So they are getting the word out early that this car is not meant to be driven in its power band. No different than the 15 years of denial on EJ headgaskets. It will be interesting to see if Toyota wants that sort of reputation for their car. Miatas are known to last a quarter million miles of hard driving.

I replaced my seals this week, #1 was gone Never been to a track or even know how to race, just drove the car in its power band. We need to find a tuner who can shorten the closed loop to open loop delay, help with the oil temps, fill in the TIR tables, and do whatever else is necessary to prevent any detonation which destroys these fragile rods/bearings.

Until then I will be keeping her under 5k rpm. Anyone who intends to keep their car for more than 30k miles should do the same.

[Sportsguy83]

Originally Posted by regal

But aren't you leary of the tuners claiming Hp gains, I mean this engine is already stretched to its limits?

So there's cars running 12K + miles turboed at 400 + whp and you say the motor is stretched to its limits from factory?? Did I misunderstood?

[CSG Mike]

Originally Posted by Sportsguy83

So there's cars running 12K + miles turboed at 400 + whp and you say the motor is stretched to its limits from factory?? Did I misunderstood?

He means naturally aspirated. Based on my experience, anyone with 400+whp and keeping their car intact (for the time being) is either not driving hard, or constantly replacing parts.

The rest of the drivetrain is not designed to handle anywhere near that much torque.

[Sportsguy83]

Originally Posted by CSG Mike

He means naturally aspirated. Based on my experience, anyone with 400+whp and keeping their car intact (for the time being) is either not driving hard, or constantly replacing parts.

The rest of the drivetrain is not designed to handle anywhere near that much torque.

Well yeah, there are different types of uses and drivers. A track car at 400 whp 300 wtq, I agree, will not last very long, will need parts to be replaced, etc. But @lexusb3 daily drives his car, constantly thrashes it on the street, (I've seen it with my own eyes), and has yet to break a part, 12K + turboed miles.

So yes it depends on usage, but the claim the motor is stretched to its limits from factory is a bit too much IMHO, maybe I'm wrong.

[regal]

Originally Posted by Sportsguy83

So there's cars running 12K + miles turboed at 400 + whp and you say the motor is stretched to its limits from factory?? Did I misunderstood?

In NA form the factory tune is stretched to its limits with the 12.5 C.R. and pump gas. The factory tune is by no means conservative. The oil temperatures sore under load, the thing has way too many knock events, stays in closed loop too long, etc.

A 12k mile aftermarket turbo'd FA20 is a different animal, but since you mention it do note that Subaru has completely dropped the D4-S FA20 in favor of their FA20T, they made that decision before the BRZ was even released. What does that tell you ?

[Sportsguy83]

Originally Posted by regal

In NA form the factory tune is stretched to its limits with the 12.5 C.R. and pump gas. The factory tune is by no means conservative. The oil temperatures sore under load, the thing has way too many knock events, stays in closed loop too long, etc.

A 12k mile aftermarket turbo'd FA20 is a different animal, but since you mention it do note that Subaru has completely dropped the D4-S FA20 in favor of their FA20T, they made that decision before the BRZ was even released. What does that tell you ?

Ok I understand what you mean now. You make good points, thanks for clarifying.

[Stevo22]

Originally Posted by regal

In NA form the factory tune is stretched to its limits with the 12.5 C.R. and pump gas. The factory tune is by no means conservative. The oil temperatures sore under load, the thing has way too many knock events, stays in closed loop too long, etc.

A 12k mile aftermarket turbo'd FA20 is a different animal, but since you mention it do note that Subaru has completely dropped the D4-S FA20 in favor of their FA20T, they made that decision before the BRZ was even released. What does that tell you ?

I agree with your first point. But you are on a slippery slope with the second point. Their decision to not use the D-4S tells me that they probably were not licensed to use it on a different model car. This car is a joint venture project with Toyota. When companies do joint ventures car components are shared for those car models, not other models. So Subaru probably liked the concept of DI and decided to make their own version with the knowledge Toyota shared, but they were not able to use Toyota's system. Also I would predict they would have to pay royalties to Toyota in order to use their system if it transferred to a different model car.