2006 Prius Multiple Misfire after Ignition coils/spark plugs tested and replaced

Don't forget to also check the cables to the ignition coils and fuel injectors.

 

I'm pretty sure it's the injectors causing your problem

@ChapmanF has been writing quite a few threads on this issue and the testing method, I think you can pull then and test it with a battery.

 

If you have a scantool, get the codes erased first. Might be the ECU is seeing that those parts replaced aren't connected to their various wiring harnesses.

Testing the injectors are easy.
You just need a 12V battery, a digital meter, an injector cleanerand some connectors with wiring, that would properly fit into the fuel injector assemblies individually, when you rove them from the fuel rail.

Here's how:
1. Remove the injectors from the rails individually
2. Connect each of the injectors individually to the connector wiring harnesses
3. Connect the other end of the wires connected to the injectors to the battery +ve and -ve poles
Be careful not to allow the connections stay long, lest you burnout the coils in the injectors.
4. You could get a helper to help with holding one of the wires to either the +ve or -ve poles before testing them if you want to service them for instance.
5. Gently tap one of the wires on the injectors with one of the battery poles, as you simultaneously apply the injector cleaner.
You should see some kind of spray pattern as you service them. At the same time, you should also hear some clicks as you contact the wires on the battery pole(s).
6. You can also do resistance or continuity test using the multimeter, and comparing the results with values from either alldata, or toyotdiy.



Dxta