I have a 2005 1.6i Megane II sedan.
Here's the problem: Car starts 100% every time even when cold. Car then idles at around 1000rpm. I reverse out of the garage and drive down the road going up to 2000rpm whilst driving. When I stop at a junction the revs jumps down to 500rpm and then the engine stalls. After this when I press the start button the engine takes a few seconds to start. Once started I have to keeps the revs up to between 2000 and 3000rpm to keep it going untill the engine is warm otherwise it will cut out.
This problem started about 2 weeks ago and without fail when the car is started for the first time in the morning this happens. The problem does not come up when the engine is warm or if the car has been standing for 3-4hrs , only overnight.
I have cleaned the TDC sensor but this has not helped.
The Camshaft dephaser solenoid valve looks a bit dirty (oil around the base of the valve, is this normal?).
Not sure what else to check ? Please help! Thanks!