2013 VE SV6 engine issue

[Ryan Kenny]

Hello, please help. For a few months my VE SV6 Z series wagon engine keeps cutting out after driving for some time when it drops to low idle. As well, it won’t kick over once it stalls. Once the car sits for sometime and cools down it starts straight away. I have had the MAF sensor replaced, fuel lines are working perfect on the computer, new water pump, starter motor, solenoids and crank angle sensor have been replaced. When an accelerant is sprayed into the air intake it starts straight away. But, I broke down 8 times yesterday and it’s becoming increasingly common. I am not really knowledgeable mechanically but I do try to understand. It’s been in and out of the work shop for weeks. Any help in what else it could be would be so appreciated . My mechanic is awesome but also can’t find the fault. Thanks so much

 

[lout]

what year is this car
ie direct injection or not

 

[lmoengnr]

what year is this car
ie direct injection or not

Z series, MY12.5 so should be a SIDI.

 

[Ryan Kenny]

what year is this car
ie direct injection or not

It’s Sept 2012 mate

 

[lout]

makes it a bit more complicated
you have proven it is a fuel delivery issue
but is it electrical command to low pressure pump
worn low pressure pump
worn high pressure pump
regulator
dont think it is injectors as it keeps running after you start it
you may need to invest in a scan tool and monitor fuel pressure when driving

 

[Ryan Kenny]

makes it a bit more complicated
you have proven it is a fuel delivery issue
but is it electrical command to low pressure pump
worn low pressure pump
worn high pressure pump
regulator
dont think it is injectors as it keeps running after you start it
you may need to invest in a scan tool and monitor fuel pressure when driving

Thank you, I had the high pressure replaced a few years ago. Hoping it’s low pressure. Could it be the ECM?

 

[lout]

Thank you, I had the high pressure replaced a few years ago. Hoping it’s low pressure. Could it be the ECM?

could be
but that is like doctor google
where every headache is brain tumour

 

[blackvxss]

sounds like fuel pump/supply issue. Pumps can work for a bit the died cool down and work a bit again