my stage 3 sapphire does not like to idle when its warm some times the idle is erractic & other times it just cuts out. when it does cut out it struggles to restart.
when it cols it starts on the key but the idles is sometimes not perfect.

any ideas?

 

had this with my escos replaced ICV and fitted new inlet side gaskets cause wasn't sure if there was an air leak problem solved now

 

an air leak on the plenum would cause a high idle though i thought
when i disconnnect the iscv it just stalls stright away

 

adjust the idle speed so that when the iscv is removed, it runs at about 850rpm, also clean out the throttle plate area

 

just done that will c what its like on the way home

 

hot start problem is still there but it now idles fine

 

what does it do (or not do) when its hot?

does it crank, does it back fire, does it turn over slowly... what?

 

turns over normally, no popping or backfires.
just struggles to start which it does eventually after about 15-20 seconds of cranking
otherwise runs perfectly. when colder always fires on the key within 2 seconds

 

Best get it checked over m8.

 

coolant temp sensor on its way out

 

I tend to agree with this as a best guess.