The code will almost definatly come up later. Its back up stored in the ECU in a redundant memory. Plus, I wouldnt reccommend pulling the EFI fuse, because that will not reset your computer.
To reset your computer, you will need to get it cleared by someone with a code scanner, and a good one, not a cheap ass one from Autozone or whatever. OBDII saves it, trust me, and it will pop up.
Also, you can get a scanner, and a good one will tell you what was happening at that time with the car, under what conditions. And if something is not right, you can identify it, and deal with it. Just clearing the codes for the MIL or whatever you want to do is rediculously stupid.
Lean fuel and occasional misfire could be nothing. But you know, I can bet there are a dozen different reasons that these things would happen. And if there is still a problem with your car, and you ignore it and clear a light, then something that could have cost you a few hundred bucks could come back and bite you in the ass. Ignore it, and you very well could have to get a new engine or a new car.
Oh, one more thing; Telling someone to just pull a damned fuse is bullshit. Giving them possiblities of whats wrong, or something else helpful would be better. YOu claim in your profile to be a Master Mechanic. In my opinion, your fuse suggestion isnt very masterful at all. Im not going to claim to be anything other than a mater debater, but you know as well as I do that there are checks and methods to elimiate causes of his MIL
Oh, and by the way, shitty mechanics fix what is broken; Excellent mechanics fix the CAUSE of why something is broken. Big difference.
Something to consider, just nothing personal.