Car idle speed raising on its own and dropping lumpy. Video

[smithyc1987]

As title my 2008 gti 55,000miles full vw history.
The idle keeps raising on its own then falling then repeating.
Heres a quick video,
Please excuse my daughter in the background.
Any help or ideas appreciated.

[Saintsteve]

Blown PCV valve 

[doylebros]

As he say ^^^^

This is worth a read

http://www.mk5golfgti.co.uk/forum/index.php?action=printpage;topic=71121.0

[smithyc1987]

Cheers lads, easy/expensive fix?

Also the temperature dosent seem to get up to middle as easy sometimes and drops and rises

[doylebros]

Cheers lads, easy/expensive fix?

Also the temperature dosent seem to get up to middle as easy sometimes and drops and rises

Read this (relevant section):-

http://www.mk5golfgti.co.uk/forum/index.php/topic,44709.0.html

20 minutes should sort it for the PCV valve.

The cooling temp may need to develop but there's a few interesting threads on cooling problems like this

http://www.mk5golfgti.co.uk/forum/index.php/topic,75756.0.html

[smithyc1987]

Done the test and removed sipstick engine splutters when put back in all is well.
So not the pcv valve.
Throttle position sensor ?
It only seems to do it when warm

[Saintsteve]

Done the test and removed sipstick engine splutters when put back in all is well.
So not the pcv valve.
Throttle position sensor ?
It only seems to do it when warm

Still PCV 

[smithyc1987]

Y y y y ??????

[Saintsteve]

Y y y y ??????

If you've never replaced it, for the sake of £37 I would.

[smithyc1987]

Also seems to be slightly running on for split second longer after ignition is switched off????

[Saintsteve]

Also seems to be slightly running on for split second longer after ignition is switched off????

Change it, and report back   

[rich83]

Done the test and removed sipstick engine splutters when put back in all is well.
So not the pcv valve.
Throttle position sensor ?
It only seems to do it when warm

If you pull the dipstick out and it runs rough, and when you put it back in it still runs roughy it's the PCV.

I think Steve might have mentioned it once or twice already. 

[smithyc1987]

No when i put dipstick back in it runs fine.

[rich83]

No when i put dipstick back in it runs fine.

Well if it runs fine then you dont have a problem! 

[EddieA]

Exactly the same as what I had, sometimes it would do it and others it wouldn't. It's the pcv, change it and it'll be fine.