Wow.....there's a lot going on there.

This is a wild guess but have you considered a bad coil? I've heard they can cause some weird symptoms when they go. From what I understand they arc out badly when worn, causing surging, rough idle, cutting in and out, working at one RPM but not another, etc....just a thought.

As for the "power" flashes, when mine flashed 16 times I was told it was a duty solenoid. It was causing flares like you describe. It's odd that your TCU gave you a TPS code. Wouldn't your check engine light do that? Maybe the Australia model uses different codes?

One more thought. The power steering pump has a switch on it that I'm 99% sure is used for the RPM/Speed sensitive feature. It's possible that is the cause of your PS woes.

Just some thoughts. Hope it helps.



Dave