Megane II 1.5dci starting problems

[Diggerdog36]

We've got a 2008 1.5dci with 65,000 on the clock. It's developed a starting problem, sometimes it fires after 2-3 cranks, but then it'll go back to cranking again before it fires properly.
But now, after 20-30 mins of being switched off, when I try and start the engine again, it'll start but it SHAKES violently as if only 2 or 3 cylinders are firing!!
This then settles after 2 or 3 seconds and then runs fine!! There are no warning lights on the dash.
Please help, it's my wife's car!

[Liam-R]

Check your glow plugs buddy, and also check your fuel line for air bubbles.

The fuel line you need to check is the one from the hand priming bulb to the fuel filter.

[Treddy]

Hi my daughters car has air in fuel it comes up with injection fault can anyone help thanks ive changed filter and glow plugs but fault still there the primer pump never gets hard i can see air when i pump the first 3 times then i pump about 24 times still wont start
Sorted it out crankshaft sensor £25 done

[Liam-R]

Hi Treddy,

Are you using a genuine RENAULT filter?

Aftermarket ones dont seem to have an airtight seal and allow air back in...

Maybe your pipes have a hole in, or your non return valve is stuck open.