Working on A Hyster H60XM, 1999 model 4 cyl. GM on Gasoline. Truck runs great, plenty of power but very hard to start! a shot of either works everytime. put a tune up kit on it, nothing. checked the fuel pressure and only has 2-3 psi. fuel filter restricted, changed and pressure went to 4-5 psi. replaced pump and pressure went to 7-10 psi. , closed off return line and pressure went up 1-2 psi? Was told I need 35 psi?? can anyone render some help?? Thanks Alan