Wont start when engine is warm!

[JustOlii]

Hi there, I've been having a few problems when trying to get my Corsa B 1.0 12v GLS to start when warm.

So what I've done so far:
- Changed the spark plugs
- Changed the coil pack
- Cleaned the throttle body
- Checked everywhere for any loose connections

The car will start up perfectly when its cold and will run without bogging down, and can be run for a fair distance (from what I've tried).
Any help would be greatly appreciated because I'm stuck with what it could be and I really don't want to have to pay garage prices.
**A mechanical savvy neighbour of mine believes it could be because the automatic choke is stuck on, but it doesn't idle high enough for that (idles at about 800)**

Thanks in advance!

[johnny]

I'd advise changing cts and crankshaft sensor, cts first because it's cheaper

[coupe77]

Sounds like the coolant sensor


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[JustOlii]

Sorted! It was the crank sensor, thanks for the help!