More ICV questions...
Hey just a quick question on an old '90 325i I'm working on. The problem is a high idle. Does anyone know off hand if the (three wire) ICV is suppose to close if it is unplugged with the engine running? It would make sense that it does but this one doesn't and the idle is racing above 1,000 rpm, 2,000 with the A/C button depressed. I assumed the ICV piston was spring loaded to return to the closed position when power (plug) was removed. I pulled the plug off but had to tap it with a screwdriver handle to get it to close and drop the idle back to the baseline setting. Or I guess if anyone else has run across this and has the fix that would help too. I removed the ICV and sprayed it out with Amsoil PowerFoam, so it's shiny clean inside and moves freely. But I thought maybe there was a spring broke inside or something. Anybody got a three wire ICV they can go unplug and tell me what happens? I left it unplugged for now. Idles a smooth 700 rpms.
Last edited by Hamfisted; 02-02-2007 at 12:11 AM.