S/C owners: collecting information

[cali yaris]

OK guys, here is Blitz's first answer. They want to confirm that the problem persists after ALL of these conditions are met. Please post up.

My next question to Blitz is if they have developed the map with a USDM ECU on hand. I can send them mine, which is no longer in my car, if they want to play with it.

Air Fuel Ratio = The chart you've provided showing lean side but Japan said it is in a fine range. [note: Noogie this is you, right?]

Fuel Controller Wiring = Japan direction is the wiring must need to be Soldered and hard wire. Do not use connector of splice etc. Can you confirm if your customers soldered the wire? Connection has to be done properly, bad connection cause resistance made improper signal to ECM.

Spark Plug = Japan recommended to replace spark plug heat range one range Colder. I believe Stock heat range of Yaris is 6, then replace to 7.

Pump Gas Quality = This is always a big issue when comes to knocking issue. Must have good clean 91 Octane Gas all the time, but this is something hard to determine because pump gas quality hard to verify......