Rod knock or Main bearing knock?

[jabranko]

Originally Posted by yaris2010RS

my winning vote is still something to do with something touching the engine. basically unless the car is hot and at its lowest possible idle is when it only makes the sound right? that is when the engine is the roughest. check the heat sheild, i think that would also be a really good place to start.

maybe someone who knows more about this can correct me, but i would also check the flexy thingy on the exhaust pipe. maybe one of the rubber bushings for the exhaust went bad. had there been any prior work done to the car within the last 3 months?

how many km on ur car? and when was the tranny fluid done recently?

Yes it's only when the car is completely warm and the idle is between 500-700. there are 53,000 miles on it and the tranny fluid i dont believe has ever been flushed from the maintenance records i have. i just bought the car two months ago. i got an oil change and fuel injection treatment done at the dealership 2 weeks after i bought it and that's all ive done. Should I have the tranny fluid flushed?