Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
Petrol or Diesel?
Sounds like restricted fuel supply to me, how long since last fuel filter change?
I would replace the fuel filter, then reassess.
While the fuel filter is off, blow through from the inlet side into a container to see how well the filter flows.
You may know before a test drive whether the filter is the cause.
It could also be a fuel pump.
Have you made any progress with your problem?
I hope my advice has been of assistance to you.