Hi, I’ve just bought a polo mk2f 1.3 NZ and the engine seems to idle quite fast.
I haven’t got a tach but I’m guessing it’s just over 1000rpm, i’d expect it to run fast when cold, but it never dies down, even when warm. 
 

Anyone know what this could be? Haynes is very vague on nz’s 

is there an idle screw on the throttle body?

 

id start with checking the blue temp sender and its wiring , then reset the ign timing and idle speed and see how it goes

Off the top of my head, I think it's supposed to be quite high, like the GT's, but not that high, maybe something like 900rpm.

 

Check your wiring loom over for damage, and likewise the vacuum hoses. NZ's use a vacuum advance, so this could have a part. 

Yeah I read it’s supposed to be 900. Not sure on idle screw can’t see one but there is a small blue cap maybe it’s under there? 

 

Cheers I’ll try that also.  Il try and get a video it.

I wouldn't be adjusting the idle in the first instance, it's more likely something else leaking, giving a dodgy reading, or not making a good connection in some way.

 

My first quick bodge test on any MPI 2f is to clip a jump lead between the engine somewhere near the inlet manifold and the battery negative, sometimes things sort themselves out, or sound different when you do that, in which case, it's probably a poor earth.

 

I know it's not exciting, but check wiring, vac pipes, dodgy earths and if the gasket under the throttle body is leaking. There's no point trying to adjust something that's not nailed together right in the first place. If all that fails, then clean the idle stabilisation valve, fit a new genuine blue temperature sender (they're basically a service part) and think about running better feed and earth wires to the ISV and lambda.