Starting problems

been for a drive 20mins got back home turned car off
10 mins later came out to go to shop and it's just turning over won't fire done this a few times ..I have just put engine back in was thinking have got some connection wrong

I would check ecu temp sensor & connector/wiring harness as I seen them bad causing serious over-fueling on hot start & also can keep fans running like other fault you reported .

Did you change/ modify anything on the harness while it was out? Just making sure, so we know that it was untouched.

Have Changed temp sensor and thermostat done nothing to wiring harness is there two temp sensors1 I changed was 1 with spade connector

^ you changed the sensor for the dash temp guage.
the ecu temp sensor has a 2pin plug .

The red connector is the Ecu temp sensor, a bit of a fiddly job to change in situ but can be done.

Or it could be this fault that somebody else had and solved?

http://www.gtir-motorsport-club.com/t1169-det-temp-sensor-faults-fans-always-on?highlight=Temp

If I unplug it will car run ok

If you unplug temp sensor it runs in fault mode.
You best first off doing a fault code check just to see if throws up something useful.
You then could remove temp sensor & test it in some hot water with a thermometer & multimeter, want check harness/connector feed voltage contact condition etc. You could bridge the terminals on harness with 2000ohm resistor which would give ecu value of below 20degC so fans should be off & should start ok in sensible ambient climate. New sensor not expensive & can be had from £6 to £12 or grab some from junk yard as they used in loads of nissans.

Ecu temp sensor changed now starts when hot and fans working as should yeh even idles better

Happy days mate ... glad its sorted ...

Great news, always good when it's an easy fix

Well diagnosed MrB. Rep point given.

glad see R on the mend & an easy fix .

Stu wrote:Well diagnosed MrB. Rep point given.

I feel sorry for Nomad I want to give him a rep point as Mr B is running away with it now