My 1990 foxbody has a new fuel pump and relay. Went to start today and just cranks. If I prime pump 3-4 times then try to start it will almost fire up on first turn then just cranks and cranks until repeat the priming. Does anyone have a clue (fuel filter, pressure regulator?) I keep reading about fuse links in wiring harness but like I said it primes every time the key is turnd to the on position. Any wisdom is greatly appreciated.