Quote:
Originally Posted by jpit
It was confirmed that some throttle bodies also make a high pitched noise and this is coming from the engine compartment. Not as loud as the noise coming from the ecu.
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Yeah I'm pretty sure a throttle body can make noise if it had some electrical stuff in it.
Another item to look for is the ABS brake system. Those make noise too at start up. Especially during start up since the system has the reset itself. For lack of a better word for it.