This has seemed to happen at random over the few months I have owned my 03 3.0L V6 Manual 2WD Ext. Cab Edge... (lol, that's just like information regurgitation).
Onto the issue:
I'll be driving along, and push the clutch in to change gears and my RPM's will shoot up to ~3,000 and stay there till I let the clutch back out (my foot could be completely off the gas pedal, I've even tried pulling the pedal outwards with the clutch in), putting the truck into the next gear. It seems to happen completely at random, but once it starts, it usually won't stop until the truck has rested over night. I can also leave it in neutral, rev the engine, and watch the RPM's stick at 3,000 for a few seconds and then slowly lower down to idle.
I thought / think it's an issue with the throttle "sticking" ... maybe it just needs a little lubricant? If someone could suggest to me where this could be located / how it can be done that would be great, I am reluctant to take it in and spend $$$.
BTW, excuse my terminology if it's wrong, I'm still new to trucks, engines, etc. I'm a computer nerd.