the fuse would be for the fuel pump, but i dont know which one it is. you can also just unscrew the gas cap and that takes pressure off the line. you will still leak whatever fuel is in the line, so prop it up once it is off. otherwise, if you figure out the fuse, take the fuse out and go ahead and run the engine until it dies, that will clear all the fuel out of the line.
oh, also, the lean condition could also be one of the vacuum lines. if one is cracked and sucking air in it could cause a problem. but i think your best bet is to try to o2 sensor and fuel filter first and then go from there. good luck!