Chris, the first thought I had was is the gauge set for PSI? Other then that I would cross check the fuel pressure with a 30 lb air pressure gauge screwed into the top of the fuel filter housing (if it's a "99). You could also cross check the gauge by plugging it into the 1/8 fitting on the top of the oil filter bracket. This should show pressure similiar to your analog oil pressure gauge on the dash.
Don't be surprised if your lift pump is underperforming.
If you are confident the other gauge is defective then we need to have a replacement sent.
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Nowel/ Performance Diesel
Don't be surprised if your lift pump is underperforming.
If you are confident the other gauge is defective then we need to have a replacement sent.
--------------------------------------------
Nowel/ Performance Diesel