A buddy at work has a 2000 ranger with the 4.0. After it warms up it idols like it has a huge cam, any ideas? He took it to a shop and they gave him a whole page of codes! peace
I had this happen on my 05 when I tried to install an aftermarket throttle body spacer. There was a gap in the back that I hadn't caught - sounded cool, but I could also hear the air leak.
I notice that sometimes my idle is all jacked up and flucuates pretty badly. Then I realize that I have my stereo cranked up and my subwoofer is hittin like a mofo. My idle RPM's only drop when I hit some extreme bass or kick drum hits. Completely unrelated though