Posted by Matt SeabrookMatt Seabrook
on June 19, 2013, 9:24 pm, in reply to "Renault Megane 1.9 F9Q800 2005 - Code DF053 Fuel pressure regulation function #"
A good place to go now would be to check the fuel supply from the low pressure pump. Stick a fuel pressure gauge on the low pressure side and monitor while the fault is happening. Fuel supply should be 2.5bar from memory. You could also scope the current supply to the in tank pump.
