high idle

[Swaggs]

So, twice now, I got off the highway, and my truck is idling between 1500-2000 rpm. and continued to do that. it made it pretty difficult to drive, just letting off the clutch im goin sideways. haha..
any suggestions?
before I got on the highway, I was idling around 600, everything seemed fine.

[dieselcrazyw350]

try backing your fuel screw out 1/2 a turn.
does your rpm keep getting higher as you drive? maybe your locknut on your idle is loose and letting your idle screw move in farther. that has happen to me.

[peobryant]

Hanging RPM is usually means you are close to runaway. I'd back off the fuel screw at least 1/2 turn and see what happens.

[Swaggs]

well i feel kinda dumb, but my high idle was caused by the idle screw. I dont know where my little jamb nut went, but when i was on the highway, the screw made its way out, and held my idle at 1800 rpm or so. its all good now.. and to think, i parked my truck for two months because of this.. hah..