Throttle Position causing speaker squeal
 

Have this really odd problem of a whiny noise being played through the speakers at roughly 40% TPS. What gives? I've double checked the wiring..

My headunitless stereo is mounted 8" away from my LC1 controller. I thought this may be contributing but the noise does not correlate at all with AFR readings. It very much correlates to throttle position. Any ideas? Im stumped!

probably need a noise filter for the radio.

Turned out to just be a pesky supercharger the PO installed.

grounding issue.