dodgy engine idle?

[joe skandal]

Hey. Can someone please tell me how to fix a ticking over problem? When I start the car first time and its sitting idle, it fluctuates between 15-20000 rpm.
Is this actually a problem? I mean, I understand that the car needs to warm up a bit, bit it just doesn't sound healthy.
It will do this for a while until warmed up. Any ideas how to sort this out?
Cheers.
Joe

[jimojameso]

Try cleaning the ISV with brake cleaner. If it stabilises you can drop the idle with the idle screw.

[The Mighty Elvi]

If my Golf idled between 15-20,000 rpm, I'd dare say it was "a problem"

 


 

[walchy01]

My 16v ticks  over from cold around 1200 to 1400, I think that may be more like the norm??? :embarassed:

Drops to 900 to 950 once warm.....

[joe skandal]

Cool, thanks.

[apie2004]

If my Golf idled between 15-20,000 rpm, I'd dare say it was "a problem"

 


 

Or some excellent news!

[mk2addict]

I had the same problem on mu 8v ended up bein throttle body gasket and vacum hoses to the brake servo had a duff non return valve,which was lettin in air after the airflow meter. Which made I rev itself embaressin in traffic lol

[The Mighty Elvi]

 

Go and have a root around in the maintenance section. Re:  setup.

[[han]]

ISV?

[Snoopy]

[Han] I think your asking what an ISV is? ISV= idle stabilizer valve.

Poor idle could be a number of things. I went to look at an 8V with a similar idle problem last week.
It could be the ISV, blue temp sensor if its a digifant, metering head, throttle valve, air leak on inlet manifold pipes, cold start valve if its an early Kjet , sticking valve, ECU etc etc.