When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Are you sure you have the correct "flare" on the end of the metal line that connects (goes inside) the fuel pump? Also looks like you do not have the threaded part (B nut) threaded enough into the fixed nut. Where the drip is.
I would take the B nut and line out. Somehow look inside the fuel pump (with out having to remove it) and the inside of the fitting and make sure that angle matches the line end flare. Then put the line back on, push is all the way on and into the pump. Then while holding it tight on.in there and sort of wiggling it then tighten the B nut (the one that slides down the line) and try it again.
Is it a new pump? I had the exact leak when I replaced mine. I went through three new metal fuel lines from LMC (none of them were an exact match to the original btw) before I realized the flare on the intake side of the pump was damaged causing the leak. Got another new pump and all went together well. YMMV.
LMC.... NOT the only place to shop for Ford truck parts. You know there is a way to cut off and re-flare that line. Or get a threaded stub to free line adapter and go from metal to rubber.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.