cranks but won't start on 2001 Infiniti QX4

replaced the fuel pump ran great but this morning same old thing

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2 answers
did it not start before you replaced the fuel pump??

roy
I know this id going back four years, but I have same yr and model and also experiencing cranks and does not start some of the time---intermittent problem. I had fuel filter changed along with the pump and intermittent problem continued. Do you have any advice? Thanks!