Originally Posted by Bassplayincrowe
I always turn my ignition off when i work on anything on my car. You're just asking for trouble if its running and you do it.
I've told this story before elsewhere, but what the heck...
My buddy Paul and I are working on the 455 he'* just installed in his car. The fan shroud is not yet reinstalled. This fact will be significant shortly.
He gets out a little portable Sun engine analyzer, about the size of a large pocket calculator with about six different big long leads that connect to various places on the engine. He hooks them all up, balances the analyzer on the fender and fires up the engine.
As we rev the engine, we don't notice that the blast of air from the fan is blowing around the wires to the analyzer. As I lean over the engine, out of the corner of my eye I notice something moving, and we both jump backwards as the leads suddenly begin rapidly disappearing into the engine. As they finish wrapping themselves around the fan, the analyzer leaps off the fender into the engine compartment and begins flying in circles *WHAPITY*WHAPITY*WHAPITY* around the engine. Finally the last of the leads tears loose from the analyzer, and our heads rotate like spectators at a tennis match as the analyzer comes sailing out and lands with a crash on the hood of a car two spaces down. "I'd better shut the engine off!" says Paul.