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Fuel Pressure Guage Going Crazy


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Just got my truck out of shop and had a vp44 and airdog 165 and set of guages electric . my question is they installed the fuel pressure guage sender at the vp44 the guage is going from 20 at idle to 0 to 5 at wot to 0 to 20 at crusing. i crawled under truck and the airdog will run awile and then stop pumping while truck is idleing. is that normal for it . any advise would help just dont want to damage my vp44 from no fuel pressure

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Alot of folks use snubbers with succes. I have a mechanical gauge and the needle valve serves a dual purpose. protects the gauge and if I do have a leak in the cab I can shut it off until I can fix the leak. The valve itself is barely cracked open. post-10340-13869818695_thumb.jpg

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