High-Pitched Frequency Update

Prawnfret

the trick is to get them to sit in the car and agree theres an abnormal sound there that needs fixing. I had this old guy sit in my car the first time and needless to say all i got was some skeptical looks. then i went to another branch and had this younger guy listen. without revealing too much info at first i asked him whether he heard anything and where he thought it was coming from. and viola he actully identified the sound and the area it was coming from.. then i promptly whipped out the stack of printouots relating to this problem from this forum (and there is alot). haha i think he had not much choice but to concur with me from that point!

well then they did some mandatory sound tests (they still didnt believe it was the ecu intiially) and eventually replaced my ECU with that from a newer Z.

and the sound is absolutely and completely gone!

after my complaint he went around testing the other Zs and apparently the vast majority of 09 370zs have this problem, some louder, some softer. GTRs have it as well

all the best in getting ur problem sorted out. i know i felt immense relief when i had mine fixed.