Fuel Pressure Help

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Aug 2, 2024 | 02:45 PM

dacker

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Fuel Pressure Help

Need some help because I am at a loss here. I have a 98.5 24 valve. The motor has been studded but still running stick injector and stock turbo. I t has a raptor lift pump with and edge tuner and glo shift gauges. I have owned the truck a about a year with no issues to speak of. I parked the truck a couple weeks ago and didn't use it for 15 or 16 days. I get back in the truck it cranks fine and I head down the road. I notice the radio lights (aftermarket) do some flickering but didn't think much of it until I look down about 5 miles later and my fuel pressure is at 0. Truck was running ok so I decided to try and make it home which I did even though the last mile it was running pretty rough. I dive into it and change the fuel filter, drop the fuel tank and blow the lines out and pull the codes. I was getting a P0122. At that point I recalibrate the apps to .5 volts and put it back together. The truck cranks and idles fine and as long as you are babying it it doesn't loose more that 2 psi on the fuel pressure gauge. However if you go to climb a hill and put it under a load the more you push the pedal the lower the psi on the fuel gauge drops. The truck still runs ok even if the pressure reads 0 unless you give it WOT then it stumbles and sputters a little. I am not sure what I need to do at this point to figure out the issue and any help would be appreciated. I will also mention the lift pump is running continuously like is should when the truck is cranked.