Having a bit of an issue with my 2009 Nissan Pixo - the car stalls intermittently after it's just been started up (it's fine after it has been running for a while though), and it won't start at all without pressing the gas pedal after it's just been filled up with fuel. In both cases, the oil pressure warning light turns on, and everything loses power.
The intermittent stalling only really happens when it's quite cold outside, and when coming to a stop, and the car also idles rough. I've tried putting in some fuel treatment, which seemed to make things a bit better, but the problem still persists.
I've taken it to a mechanic, but because the problem is intermittent, they've had trouble finding the fault.
Anyone got any idea what the problem could be? Any help would be appreciated