Nissan 350z hot start problem

[Discopotatoes]

Hi All
The wife’s 350 won’t has trouble starting when hot, it started out with a couple of codes.
first was upper o2 sensor on bank 1 so changed both o2 sensors. and a cam sensor. After this it has developed a fraction of a second hesitation when cold starting but will fire up, but not when hot it just cranks and cranks.
If I leave it to cool for about an hour it will restart.
there was a chap on the Nissan forum who had the exact same symptoms and diagnosed it to the fuel pump not holding its prime so after changing that it’s still the same. Anyone else had a similar issue? Where should I be looking? I don’t want to swap out parts to try and find the fault.
Things tested
Coolant sensor
Iat sensor
Lower o2 sensors
Cam sensors

Over to you guys

[aka_kerrly]

Have you plugged the car into an diagnostics obd port reader??
Check the crank sensor next.

[Discopotatoes]

Yes and have no codes, that was my next port of call as I have a spare sensor but it’s strange that it’s only when hot and at no other time

[davey83]

How did you get on?

My thought would also be either crank sensor (clean or replace) or coolant temp sensor still faulty.