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***UPDATE*** I have finally located a small hole in a fuel line I installed that goes from the fuel block to the passenger side front engine block. Is it big enough to say yes thats what caused the massive fuel dump and lack of engine power.. We will find out

I also forgot to mention that I took it for the test drive, and the turbo seems to over boost pressure with lack of power. I am not sure if its related but I am also trying to track down that fix.

So I have recently been having fuel pressure issues. I have pretty much replaced the entire fuel system now. I am running a draw straw to an Air Dog 150 to a Driven Diesel Dual Bosch fuel pump system, to a driven diesel fuel bowl ****** which feeds a sinister diesel Regulated Return system which...

Not with the AD150.. If you get a Air Dog II or the Air Dog II 4G, then you bypass the OE pump.. I cant speak on the fass, but I am sure with their bigger pumps its the same thing.

\ Well Looks like Ill look into that now haha Thanks for the help

I am currently having about the same issue. I put a AD150 on recently and that has made it driveable. (I.E I can get up to 80 mph without going wot and hold pressure just fine.) If I do go WOT it will drop just as yours. I am currently trying to figure out if its the lack of pump or restriction...

Ideally you shouldn't need to crimp it 100% closed, just enough to raise the pressure some. If crimping the line 100% closed doesn't increase the pressure very much, and driving it with the line crimped 100% closed doesn't fix the pressure drop issue, you have a FUEL DELIVERY (VOLUME) PROBLEM...

The chances of them not being 170s is possible. The list i received from the shop that installed them actually said 70HP injectors. Which with what i looked up my best guess was 170 injectors

Ok so got it crimped to 75 PSI. Ran it under load and had same issue as stated before. I might have been able to get closer to WOT but not by much

If I am following you, Are you looking to see if its the fuel bowl/Stock Regulator housing that is the source?

So at idle I had little to no change, maybe 1 or 2 PSI. Ill have to try tomorrow under a load to see what happens.

I do have a pair I believe

Yeah, they are just quick to recommend a bigger a lift pump.

Sinister Diesel

Yes I still have the Factory Secondary Filter Bowl. I have replaced both lower and upper fuel filter bowls at every oil change (5000 Miles). I just changed the fuel filters literally 3 days ago when I installed the life pump

Negative. I have Pulled the Tank Twice now. First time to check if I had those Filters and Second to Install the AD150. I even did my best to clean out and sand and what not that may have been in the tank from before.

So I have tried about 10 different things to fix my fuel pressure and have spent countless hours of research. I need your alls help. I have a 2006 f250 6.0L. I am running a AD 150 feeding a stock pump, with a RR kit. I have 170 injectors (installed by previous owner) SCT tuner with a Extreme...