I installed a vortec stealthram 383 in my 88 ta.I started the car and it ran 5 minutes then died.very little fuel in the rails(no pressure)If i crank the car hold the pin down(shrader valve) fuel shoots out.I removed the fuel hose from the chassis and fuel shot out. With both hoses removed sh ould i be able to blow through.it has the adjustable regulator.Could this be my problem? can it be my fuel pump? im stumped