2.0 injector issue are they just random

[taxidriver50005]

Apparently it isn't carbon that's causing the issue it's corrosion, the fuel based cleaners are designed to clean carbon or varnish off injectors so another approach is needed. 

Maybe removing injectors and ultrasonic cleaner might work. 

[Steven83]

Well I have properly analysed my car today during my drive to work and back and I didn’t notice any issues. 

[trashman1965]

4 hours ago, taxidriver50005 said:

Apparently it isn't carbon that's causing the issue it's corrosion, the fuel based cleaners are designed to clean carbon or varnish off injectors so another approach is needed. 

Maybe removing injectors and ultrasonic cleaner might work. 

Yes, I was surmising carbon built up while the injectors were blocked as the engine improved noticeably over several hundred miles after injectors were replaced.

Just an indication that the additives work to clean/prevent issues due to carbon not that carbon was the issue. 

But the additives didn't stop or prevent the corrosion.

[taxidriver50005]

1 minute ago, trashman1965 said:

Yes, I was surmising carbon built up while the injectors were blocked as the engine improved noticeably over several hundred miles after injectors were replaced.

Just an indication that the additives work to clean/prevent issues due to carbon not that carbon was the issue. 

But the additives didn't stop or prevent the corrosion.

I've started using wynns dry fuel to try to remove any moisture from tank, also filling at a know good filling station. 

Before I was filling anywhere I was passing that was cheap. 

[AisinW]

E10 fuel is never better than E0 especially for long term storage. The alcohol absorb water and cause corrosion. It is very common with carburetor Lawn mowers. The aluminum parts rusted out if we don't drain the entire tank before winter storage. 

It is much less problematic with modern cars. I think the direct injectors with high pressures fuel are just more prone to fail just like in VW and other brands. Hopefully, Toyota found long term solutions with better built injectors. 

[taxidriver50005]

10 hours ago, AisinW said:

E10 fuel is never better than E0 especially for long term storage. The alcohol absorb water and cause corrosion. It is very common with carburetor Lawn mowers. The aluminum parts rusted out if we don't drain the entire tank before winter storage. 

It is much less problematic with modern cars. I think the direct injectors with high pressures fuel are just more prone to fail just like in VW and other brands. Hopefully, Toyota found long term solutions with better built injectors. 

Unfortunately it's not the direct injectors failing but the old style port injectors. 

[AisinW]

That's surprising, the port injectors are much easier to replace and DIY friendly. Sorry for my ignorance. I thought it was direct injectors that failed.

Probably just a bad batches of injectors in 2.0L European suppliers. Are they made by Bosch or denso? 

[Red_Corolla]

38 minutes ago, AisinW said:

Probably just a bad batches of injectors in 2.0L European suppliers. Are they made by bosch or denso? 

I believe they're Nippon Denso components as favoured by most of the Asian manufacturers, especially Toyota, since they own a large stake. Seems like there's an uncharacteristic flaw in the design and/or manufacture, in this particular case.