Megane 1.5 DCI

[touareg]

hi all members
i have a renault megane 1.5 dci fault code is df053 Rail pressure regulation function
the car don't start but some times start it run 5 to 10 mns and sudanly stop
please i need help

[m3evo]

hi all members
i have a renault megane 1.5 dci fault code is df053 Rail pressure regulation function
the car don't start but some times start it run 5 to 10 mns and sudanly stop
please i need help

Fault code simply means that the ecu cannot control fuel pressure in the rail. Pumps are very weak in these cars. Have a look at live data when cranking and check rail pressure. if pressure is too low take fuel regulator off pump and check for metal filings. If there is filings inside then the pump is damaged and will need replaced.

If replacing the pump all fuel lines and tank will need cleaned to remove contamination.

[touareg]

hi m3evo
the pressure is from 120 to 195 br but the car don't start

[nynol]

check injectors

[touareg]

thank you nynol i already check i found 2 damage
thank you

[joubliss]

u have a a injector leak. normaly the car start when he pressure become 230bars but in your case the pressure dont arrive to the normal condition to start. check injectors.

as he said m3evo there is a common problem with pumps too check this too.

[touareg]

i already change the injectors the car start but the pressure going until 1270 br so the car run some mns and stop

[clautosing]

If you woul have an injector leak the pressure on crancking woul be less than 230 bar, but if you have around 1200 bar i think that HP pump is defective. Did you find metal particle in fuel tank ?