My 3 cylinder, CGPA, 12v engine is struggling to start after it's not been used overnight. It turns over OK but coughs and splutters. On second attempt it starts straight away, as it has always done on the first turn of the key up to recently.

My VAG code reader does not show any fault codes.

I'm wondering if the cause is lack of petrol fuel pressure caused by a failed non return valve.

Is there a a NRV in the fuel system?

Or could there be an auto choke process that isn't working as it should?

TIA

1 hour ago, Doily said:

there a a NRV in the fuel system?

I don't think so.

Does the fuel pump prime when you first open driver's door?

In Mk1 Octavia's fuel tank there was an NRV on the outgoing line of fuel sender, at least in a 1.9TDI110 that I used to own, so Mk2 Fabia could have one too.