The spring inside a fuel pump determines what the output pressure will be. If you're rebuilding a pump and the replacement spring in the kit makes the lever arm a LOT harder to move, chances are you're building in a problem instead of helping yourself.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!