One thing I recently found out is that these systems need servicing at least every 12 months or 15,000 kms.
They are not like the old time systems these have 2 filters that need to be replaced otherwise
the flow to the injectors gets restricted & with low flow, when the pressure pressure drops the system will
automatically cut out & switch back over to petrol whenever you give it much throttle.
You can buy both filters & seal kits shown in this video on ebay for around $30 delivered.
I thought this video was quite well done