Heed the advice on the cover of the Hitchhiker's Guide to the Galaxy and don't panic, at least not yet. Or, maybe just panic a little on the inside, but maintain your calm demeanor on the outside.

Have you ever wondered how fuel gets from the tank of a car to its engine? Well, for a diesel engine, it all starts with the lift pump, which is a low-pressure pump that draws the fuel up and out of ...