can you help just got a 3door cosworth and it was puling well with 20psi then it startid runing out of fuel so drove to fuel staition put 56 pound in super unledid but it still felt like it was out so drained it out put unledid in stil did it tryd new plugs leads dizy cap and arm ignition amp box coil fuel pumpand filter drove up the road the boost came in good 2 or 3 times then it startid doing it again what could it be???????