Tonight, was getting on the highway to get home. Probably a mile away.

As I was cruising, my A/F all of a sudden pegged at 20. The car was running way lean and would not add any fuel whatsoever. It never cleared up, but idle'd fine (still pulled normal vacuum and idle'd smooth, so there are no leaks). I got it home without lean popping anything (driving only with the primary throttle plate is sloooooooow).

Now the question - What went wrong? AFM? TPS? I've been suspecting the AFM not being in such great condition with the way the car runs sometimes. I thought that the AFM had jurisdiction over fuel input but I guess throttle % does too.... so I will check both tomorrow, but wondering what you guys thought.