Trouble starting after hot

[300zxmack]

Hey my 1991 300zx tt starts fine first time, runs great. If I shut it off for 15mins it starts fine. If it's off for 2hrs it has trouble starting, almost like it floods its self. I can hear the fuel pump prime the system. It turns over fine but won't fire up. I've check for spark. There is fuel you can smell it. If I take the fuel pump inj fuse out turn it over for 5-10 sec put the fuse back in, it starts but stumbles some time stalls. Sometimes runs any ideas of what is going on

[PapaSmurf2k3]

That's weird. Only thing I can think of is something is wrong with the coolant temp sensor or the wiring going to it.

[300zxmack]

I'm going to clean thos next iv cleaned the ptu wiring. No change the plugs are so brittle. Poor car

[PapaSmurf2k3]

Yeah the plugs are definitely brittle. I used to have an issue with flooding (randomly) with my 240 and had an issue with the entire wiring harness on the car. I replaced it with one from wiringspecialties.com and haven't had a problem since. Best mod ever.

[300zxmack]

I hope it's not the wiring harness. It's been fine since I got it about a year ago. Thanks for your input