Forum:
Is it the throttle body which controls the auto choke on sportraks 
My sportrak has no auto choke so from cold struggles and runs poorly as revs are low untill warm when it pulls and idles perfectly.
I have the oppertunity to get hold of a spare throttle body , is it likely to solve issue
Rich
No, the throttle body
No, the throttle body controls only the incoming air, measures the volume.
You should have no choke, the fuel system should have a cold running map which it switches too and this controls the fuel system to compensate by increasing the fuel entering the engine, and giving a slightly faster tickover.
This relies upon two things to work, one being the coolant temperature sensor, which is a common problem with these engines, and the throttle position sensor which could be located on the throttle pedal or throttle body on the end of the spindle, and is out of adjustment and won't allow it to hit the switch when the throttle pedal is not touched.
throttle position sensor then ?
i changed the coolant sensor as it was putting the engine light on , now the engine light has gone off.It still doesnt have an increased tickover from cold which causes it to almost die, if left it then picks up to 800rpm then whel fully warm 950rpm.
can i adjust the throttle position sensor as it sounds likely for this to be playing up.( Last week i changed the throttle position sensor for one from a known working daihatsu sportrak and it made no difference atall ). The revs also bounce at 1500rpm untill you disconnect the throttle position sensor.
Could well be.
Yes, The throttle body probably has coolant flowing through the base, which has a sealed wax valve chamber. This valve controls the airflow through the air bypass hole inside the throttle body
It is also very common problem on the GTti now they are old. The wax valve seizes up and you are left with either a poor cold start due to not enough air(jammed shut), or too fast a idle when warm from too much air. (jammed open).
Does the sportrak have coolant flowing through a chamber on bottom of the throttle body?
If so then likely the fault.