I started my truck this am with 45 miles to empty showing on the overhead. Started fine and ran for about 2 minutes and died. I retried starting 3-4 times and each time engine ran for a shorter amount of time. I put in 5 gals of diesel and retried with same result. So I opened up the yellow valve on fuel filter and heard air like it was sucking for an instant. With the valve left open I cranked engine and got a little fuel but nothing like I should. Now I am getting nothing from the water separator valve and engine will not fire. Also engine is throwing no codes at all. Pls help!!