Takes a long time to crank before it starts
I have a 1995 4.0 auto that has had a complete tune up plugs cap rotor wires distributer filters. It takes about 20 seconds of cranking before it starts. It got to be fuel related . It losses fuel pressure in the lines after 10 minutes of not running. I replaced the pump no change.
I'm pretty sure its an o ring in your fuel pressure regulator. You can just turn your key over a few times before you start or buy the whole assembly its not cheap. Or you could do the swampy bypass conversion. Hope this helps.
Did you replace the pump with a new one or a remanufactured one? I've seen some techs go through a few remans before they got a good one that actually worked. You could have a fuel injector sticking open, but that should also cause a misfire. Have you checked your fuel lines for an actual fuel leak? It's not common. but it could happen.
Check your battery connections and make sure they are not corroded. My buddy has battery terminals that are soooo bad I have to clean them once a month for him. It will start wicked for 2 weeks then go downhill until I clean them again.
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