Cutting out issue.

[fudge_sta]

Symptoms:

Before the engine would cut out once warm, i had an issue with the car not idling correctly and taking forever to warm up.
I suspected it to be the blue temp sensor and for good measure i was going to change out the thermostat.
Unfortunately i still haven't got around to doing this but the other day the battery went flat as i haven't drove it in a while, so i charged it up, once i put the batter back in started her up she fired up fine but once the temp went over the blue line it would cut out.

I then start her up again immediately and she always fires straight up again but as soon as it hits idle it will cut out.
Odd thing i this only happens once warm as i left it for a while to cool off and went to start it it started and idled all be it a little bit rough but it didn't cut out. So i know its an issue with it being mainly when car it warm.

Car is M20 325i cab

Any thoughts?

[Grrrmachine]

Probably is the blue temp sensor, but you really need to test it to identify where the problem is - don't just replace it blindly.

[hansfreekit]

I had a similar problem. Surging and stalling occasionally. Turned out after some diagnosis to be the idle control valve actuator was sending a random signal to the ECU. Replaced the icv and it was fine.. Then set up the idle corrctly..
Electrical fault finding recommended.
HF