Odd Noise

[der Mond]

I'm getting a squeeky-chirpy sound each time the engine accelerates or decelerates. I can hear it only when rolling at 0-40 mph; if I punch it just a tad or back off suddenly. It's as though it's in response to subtle engine movement. Motor mounts are fine, it's not the throttle or brake or clutch pedal. It sounds like it's coming from the firewall area. I inspect and inspect and can't see anything unusual. CV joints are fine and it is the same when turning or straight. Anyone else had this?

[claymore]

Could be the rear mount or the header splash shield. Try spraying the rear mount with some silicone to see it that is it.