I am driving my 94 v6 runner like any other day stopped at the light about 3 miles away from home. Light turns green and when i accelerate, i hear a car missing an exhaust like sound. Thought it was someone's car when I realized the sound was matching my rpms. Park onto a nearby street and my idle is rough and thready, sounding like it was about to stall, and there was a sound coming from my engine like I had no muffler. I drive back home, cursing to myself what could be going wrong, I was thinking a bad cylinder, which could be caused by any number of reasons. 
After staring at the fsm to do checklist of what could be wrong, I open up the hood, and take a look and I find out what is wrong. Driver's side spark plug completely unseated itself and was just dangling there. WTF So I wipe it down, screw it back in, and everything is back to normal.
Cliffs: Hear a sound, find out the spark plug completely unseated itself, put it back in, its back to normal.
After staring at the fsm to do checklist of what could be wrong, I open up the hood, and take a look and I find out what is wrong. Driver's side spark plug completely unseated itself and was just dangling there. WTF So I wipe it down, screw it back in, and everything is back to normal. Cliffs: Hear a sound, find out the spark plug completely unseated itself, put it back in, its back to normal.
