Running Hot

Yeah, a little more info. I wouldn't leave the pump off until it warms up though. I turn mine on when ever the engine is running but leave the fan off until it gets around 130-140. I should mention here that my car likes to be cold, I don't like to leave the line at more than 140-150.

And to answer your question yes, running the carb lean will make it run warmer.

Will my car overheat if it's left to run? You bet it will. You'll need to regulate the temp with the fan and how long you run the engine.