2.5tdi cold starting issue

[JimLoskot]

I'm starting to have trouble when starting from cold, its fires over first time and the revs go up but then it just dies, it will carry on doing this untill I give it loads of throttle. this happens with both sets of keys.
I have done some searching which suggests it may be the immobiliser or the coolant temp sensor (this was replaced last year). It starts fine without any throttle after its had a quick run out. seems to me like the car doesn't know its cold, what other sensors tell the ecu that the engine is cold?
oviously getting it scanned would be ideal but any other suggestions or ideas first?
Its had a new battery and coolant temp sensor and new cam belt/ thermostat/ water pump/ coolant recently.
Thanks in advance
Jim

 

[quattrojames]

Glow plugs or fuel pump timing perhaps?

 

[JimLoskot]

don't think so because its only just started happening and its far too warm for the glow plugs

 

[Mike B]

Electrical fault?have you checked the connectors on the loom for poor contacts

 

[Turkster]

plug it in mate, we could be here for hours guessing, my moneys on a sensor, does white smoke come out if it when it does finally fire up ?