Anyone Tried AliExpress/Chinese Mail Order Injectors?

What is your issue with your existing injectors? I can't offer any help with Aliexpress injectors but if your current injectors are operational you may consider cleaning the injectors yourself. Youtube has several video showing the use of carb cleaner through hoses through each injector using a 9v battery to open the injector.

Better yet is to get a canister fill it with an injector/carb cleaner that you connect to your fuel rail, attach pressure via air compressor and you can clean all 4 injectors inplace. You can purchase these on Aliexpress but the cheaper ones don't seem to have the connection to provide the appropriate pressure to the fuel rail. You can use this tool on all your cars.

 

I've never used a professional cleaning service however, there are several members of a Miata forum I'm part of that have had good experiences. They test the spray pattern, ultrasonic clean and replace caps and rings. Here in the states, depending on the car you can get new injectors for a little more than the cleaning service. Mr. Injector charges $18 per injector plus shipping both ways.

I would confirm that the problem is not with spark (inspect plugs and coils) and clean throttle body before spending money on new or cleaning service for injectors.

Not sure how difficult it is to remove the injectors from a Prius but if it is easy to remove I would first attempt to clean with a can of carb cleaner and a 9v battery (youtube).

 

Can't you get replacement injectors from either a Yaris or echo? They are of thee same 1NZ engines. If they aere expensive to get new, you can get those from any junk yard that handles Yaris or echo Toyota vehicles.

 

Have you tried a fuel injector cleaner, the kind you pour in the tank at a fill up? Look for one PolyEtherAmine (PEA) and good reviews. It's "low hanging fruit", something to try first.