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You're talking about the fuel screw inside the IP, under the triangular plate on the side, right? "Towards the radiator" makes me think you're adjusting the "torque screw" or whatever it's actually called, which is on the outside of the pump.
I did it when i had the pump of and sitting in the vice lol. I was simply saying so theoretically. That said, things are alot clearer when using terms like clockwise / counter clockwise, in / out, vs. toward the radiator, especially when the screw is parralell to the axle, the screw would turn in towards the drivers / left side if anything.