Harrington

Hi all,
I bought an integra about a month and a half ago and since then I’ve had this weird problem where sometimes the car won’t start but will crank or sometimes it tries to start but just sputters and then starts but sounds like it’s misfiring really badly? I’ve already tried a few things replaced distributor and plugs, fixed timing, replaced coolant temp and coolant temp gauge sensors, replaced sparkplugs, replaced throttle body too and I am about to do fuel pump… if this doesn’t fix it I am officially lost because I cannot find anyone else who has had this same problem where some days it starts fine and some it doesn’t.