Saturday I bought an 02 GTP from a friend. Car had a 160,000 miles and was well maintained. There was a coolant leak from those coolant elbows. That was it. They drove it 2hrs up to me. I started it and lookEd around. Then started it again a little later and pulled it in the driveway. About 4hrs later I try to start it and it starts really hard but then levels out and everything's good. Drove it around. No loss of power or hesitation or anything. Well the hard start condition gets progressively worse. 6-7 cranks, won't start without giving it gas, finally won't start at all.
I've replaced the coolant elbows. I replaced the fuel pump. Replaced the fuel filter. Depressed the valve on the rail and have gas there. Took another plug and wire and connected it to each terminal on the ignition coils and saw spark off each. I'm just at a complete loss as to what it could be. The first day, when I was still able to drive it, it popped code po300. Put some fuel injector cleaner in the tank and topped off with 93 octane. That code cleared the next day for the 5min I drove it after replacing the coolant elbows.
Im just at a complete loss as to where to go next. My friend swears up and down they never had this issue. I've known them for 14yrs so I'd like to trust them. I'm assuming it has to be something stupid then, but god knows what. Any help or advice would be greatly appreciated