Hello!!!!
OK...MR Revhead is right, the ECU is a TRD ecu that was fitted by Toyota (there's a thread about it somewhere here, remember replacement cost was about $20K?!!) It has not, to my knowledge been chipped. Its the standard ECU that comes with my model car.
The Toyota dealership that is local (in the Adelaide Hills) I've only taken it to them once because it was convenient, but I will probably be taking it to the City Toyota Dealer, CMI (although I've had problems with them in the past..MR2 related..) it's not the people who sold the car originally.
No one knows what the noise is yet, I may know more on Thursday when I take it to Fours and More (for Dyno Tests primarily to see if they can sort out the over fuelling issue - related to the smoke blowing) but they may have an idea on the noise (somewhere around the water pump).
The new clunking noise that I have coming when I'm reversing hard left out of my driveway I think is CV joints, but not too sure, I'll ask fours and more about it.
Does this clear up some of my problems???
Lesley :)