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Originally Posted by zhock
...I have one more question of concern. The Old Master stated that with the pump off the fuel pressure should maintain at least 55 psi for at least three minutes. It held 62 with power and dropped to 55 in 90 seconds with the key off. I did not see any indication of a leak on the regulator so I am guessing that it is just allowing more fuel that normal to return to the tank during operation. Do you think it is starting to fail or could it have been set up that way and may just keep on going. If you think it is a good idea to change it out based on those figures let me know and I will go ahead and replace it.
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This site explains how the regulator works:
http://www.picotech.com/auto/tutoria...actuators.html
It's a very simple design, and quite reliable. No need to replace yours, it's working fine.