Okay, I cleaned the IAC, cleaned the MAF sensor, and replaced the fuel filter, but it is still not idling correctly. I also removed the MAF sensor connector and that didn't help.
I think I have an idea of what might be wrong, but I need a little help. I have a Duratech and there is something out of place. Next to the IAC (just left when looking at the engine from the front) there is black thing which is attached to the air intake manifold with two bolts. A hose from the EGR valve is plumbed to this device. I think it is the EGR solenoid valve. Anyways, it appears that I am missing the cap to this device. My insulation on the hood directly above this device is burned away slighlty. With the cap missing, an air fitting is exposed. If I put my finger on this fitting while someone else is keeping the car idling, it will kill the engine. Something is out of place, and I wonder if this is the root cause of my problem. Can anyone tell me exactly what that part is, and if it is critical to idle performance?
Thanks much.
