Hey all, I have a 1985 FJ60 Desmogged non HAC setup. The noise did start after the desmog. Basically, the noise sounds like static coming from the rear side of the engine near the manifold/carb section. It's definitely cause by a vacuum tubing. I can pinch the tubing, which gets manifold vacuum, and the noise stops. I can disconnect the tube and the noise stops. Disconnecting or pinching the hose coming from the A/C diaphragm does nothing. The pictures are from the desmog thread. The tubing I'm talking about runs from the driver side fender going to the back on the manifold, where there is a nipple. Just above this nipple is where the brake booster gets vacuum. The pictures are from the desmog thread and they are of my setup. The tube that gets pinched is the one with the red lines heading to rear of the engine. The other red lined tubed goes to the A/C diaphragm. The connection between those two is the stock connect with some sort of adjustable dial and two electrical wires coming out.