i checked the fp on my stock truck yesterday at the test port fitting. i used one of the fp gauges from autozone thats liquidfilled with the truck running it was about 10 psi when i reved it would drop to 0 or 2 psi is this normal or is transfer pump going going gone, also i bought ne buypass lift pump from bd diesel should i stop driving the truck untill i put the new pump on or am i ok thanks any help would be nice...
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2001 2500 4/4 straight piped 410's 6spd K&N, Silencer ring MIA, 4 in. new holley lp and edge juice with a2\hot/, taped 'pump wire'