can anyone help please

when i start my car it starts ok but when you leave it running it idles at 2200 rpm and never drops to what it should be but it still drive fine an gos like a stabed rat when u get it over 3500rpm i think its the auto chock but like i said i need some help to figger out whats wrong i have found that the rad is leaking water dont knowif that will affect it or not  :dontknow: thanks terry

What engine is it?

does it come down at all when its fully warmed up. and what is the engine?

hi its 1.8 gti k jet injection an no the revs dont come down at all it has now started to make a whistling noise from the inlet side but only on tick over or when u shut off the acelerator soon as u put ur foot down it stops if this is any good please let me know realy startin to do my head in thanks terry

timing on the dizzy, i'd get your ignition timing checked and adjusted.
should sort that out a treat.

Based on the sound and the high idle, I'd say it's a vacuum leak. Check all vacuum pipes.

The obvious thing would be, to adjust the idle speed. If the screw at the back of the throttle body is all the way in and its still high, then you can do a 'course' adjustment on the butterfly valve. It could have a vacuum leak, or other issues eg timing, but I'd first look at/adjust the idle speed in the normal way.

In reference to the whistling noise on the inlet have a look at the rubber cover on top of the fuel metering head. There is a bung which fills an orifice on here, on my golf this fell out and caused a few issues, I can't remember if it caused it to rev too much though. I think the bung is yellow but I've not got my golf with me at the mo.

Check this, if your bung is missing start the engine then put your finger over the hole and this may sort the problem (permenantly when you put  blank in). I would definatley check the idle adjustment screw; if these things don't cure your fault check the timing.

I had this.
In my case, and probably yours, it'll be the Auxiliary Air Valve (AAV). It should bleed extra air to the engine when cold to raise the idle, but they go wrong and raise the idle when warm too, leading to the problem you mention.
It's located on the back of the inlet plenum chamber, facing the bulkhead. Quite hard to see or get to, but easy to check; There's a rubber air hose, about 20mm outside diameter, leading to it round the left (as you look at it) side of the engine (offside of the car). With the engine idling (high presumably), squeeze this pipe with your fingers to close it down - you'll probably see the revs drop as you constrict the hose, and rise again as you release your grip.

In my case, unwilling to pay quite a bit for a new one, I've just clamped a jubilee clip over the hose and effectively blocked the air passage. The idle is obviously now a bit low during the warm-up phase, but it doesn't stall, and of course it's fine when warm. Worked ok for a year so far…

thank u all for the ansers i found the whistling was coming from a screw thing on the back or the inlet maifold near the top i have screwed it back in and now no noise an droped the revs down to just under 1500 rpm but it wont go any lower if u dont mind jonharmer can u put a pic on here as i cant find that hose thank u all again