Who is the best person to have my Vitz 2005 checked in Rwp/Isd. The ABS light is not going off. Engine knocking on certain rpm, mileage dropped and loss of power. When accelerating at first the car pick is fine, often leaving other cars on traffic lights, but after that around 40-50 it feels as if the car is dragging something and engine knock is felt, but one it comes in to flow and momentum takes Over, the drive becomes smooth and silent.
I am using
Liqui Molly 5W-30 engine oil.
Original oil filter
Original Air filter
Original Drum brakes replaced with another pair of genuine pads but they squeal when slowing down for speed bumps etc.
Replaced spark plugs with Toyota iridium about 6 months ago.
Never had had exhaust system checked though. People suggest removing CAT converter but I am not convinced as it's just word of mouth but no technical details.
Never had had engine tuned up or ratios resting. Which I think is the case here but I am unable to find a qualified person in Rwp. My regular mechanic, though expert with JPN imported cars, still haven't been able to restore power and mileage. All he suggests is to change CVT guild but I read it's not necessary to do so under 50K run on freshly replaced one.
Any my more suggestions ?