Fuel pressure 97 7.3 - Ford Powerstroke Diesel Forum
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Old 04-14-2011, 09:07 PM
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Fuel pressure 97 7.3

Was checking my fuel pressure on my 97 7.3 today anyway the way i understand the pressure is supposed to be between 40-60 psi my question is when i checked mine today it was bouncing between 50- 65 psi i believe the pressure is good but should the needle bounce so errratically? or do i have issues with the fuel system I'm having other issues with the truck throwing the check engine light but not a code kinda self teaching myself on repairing it myself by checking stuff i read on these forums any help would be appreciated
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Old 04-15-2011, 12:17 AM
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The OBS trucks use a mechanical fuel pump, so some jumping around is to be expected.
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Old 04-15-2011, 08:29 PM
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The mechanical pump is activated by a cam lobe which makes it erratic on a gauge. Mine bounces crazily between 40 and 60 psi.
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