volvo xc60 d4 cuts out 2014

[MissSpentYouth]

Hi All,

I have a 2014 volvo xc60 D4 with 100k on the clock

It has a randon cutting out issue which is getting worse

When I am approaching a stop the engine will cut out and then try and restart, then cut out again. Sometimes it will restart ok and idle fine but as soon as I try and accelerate to move away it just cuts out again.

If you can gently coax it back up to speed it is ok again untill you have to come to a halt once more. Makes it very difficult to do a hill start.

No Fault codes :-(

If I turn off stop start makes no difference

If I monitor the fuel rail pressure I can see it is perfectly normal at idle and when it is working fine all good. However when it is in its fault condition the fuel rail pressure is just dropping away and then it stalls.

The reason it stalls is definately due to dropping fuel rail pressure

I have changed the fuel filter and checked the fuel supply to the high pressure pump loads of fuel comming through at good pressure definately no problems with fuel supply to the high pressure pump.

I have disconnected the EGR valve made no difference, blanked off the EGR valve made no difference, swapped out the EGR valve for a used one of unknown condition initially I thought this made it allot worse but then after putting the original back in it seemed better initially but then was bad again shortly after.

So I am a bit stumped.

Have a niggling doubt that it is a faulty EGR valve but given the above hard to justify.

Favorite thought is the fuel rail pressure control valve

Any thoughts very welcome ?????