Corolla Verso D4D 54 Starting Problems

[Anmos]

If you have defficulties with just starting the engine not when the engine runs so it can not be injectors. 

[Barry F P]

I'm having a similar problem but mine is two or three times a week I press the button to start it fire's then stops and turns over a few times until it has repressurised the system and starts fine I'm sure it's a lack of pressure but only occasionally is the bit I don't understand I changed the scv valve not made much difference just wanted to know if there is a non return valve in the fuel system