Thread: Mechanical fuel pressure gauge question
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Old 03-29-2003, 01:23 PM
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Default Mechanical fuel pressure gauge question
I'm using Autometer gauges and the fuel pressure gauge is mechanical. I've also got a new Holley fuel pump that replaces the stock Ford pump on the s/o. (Holley claims 6 to 7 lbs. for that pump)
When I first start it up the gauge reads between 6 and 61/2lbs. fuel pressure and after driving a short distance it increases to between 9 and 12lbs. If you let off the gas it starts to return to about 7lbs. or so.
I did try switching gauges but I got the same readings. Does 9 to 12lbs. seem like too much or is that normal? I always thought you might blow the needle and seats with that much pressure.
BTW I am using an isolator and don't have a regulator but if the pump is only good for 7lbs. how can it increase?
Thanks!
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Last edited by ST; 03-29-2003 at 02:16 PM..
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