VOLVO PENTA 5.0 GXI-E Start problem

[Honza83]

Hello, I have a problem starting the engine. When the engine is cold, it starts immediately but switches off immediately after the first start. The second start will start and function normally. When is motor warm and longer standing (30 minutes and longer), it does not start, but when I accelerate, it starts immediately. Anyone have any idea?
Idle Air Control I have new.... Thanks.

 

[Scott Danforth]

what is your fuel pressure?

 

[Honza83]

I do not know. Should I measure it?

 

[alldodge]

Measuring the fuel pressure at the rail would be good to know if the pump is working correctly. It should be 50 to 60 psi

When the motor is cranking before it starts, do you see the tachometer showing at least 300 rpm?