Many times when a rough idle condition exists, the regulars have suggested removing and cleaning the IAC valve. My 1991 Ranger from time to time, idles rough, and over the past year, I noticed sometimes when I let off the throttle or push in the clutch to shift, the engine continues to idle high as though the throttle cable is stuck.
Now, I did already remove the IAC and spray it down liberally with WD-40 or similar, but the engine still tends to idle a bit rough at times. Visually, I couldn't see much carbon or deposits on the IAC itself. The throttle cable is also fine as well. Is there a better way to try and clean the IAC, I was gonna remove it again and let it soak overnight in a container of Varsol.
BTW, this truck is off the road now, so it isn't really a big deal that it runs perfectly. I'd just like some opinions whether it is worth cleaning this way or not in case I sell the truck or decide to put it back on the road.
Sharky