steady revs but rough idle

[vwwvgolf]

hello [people

 my abf will sometimes idle spot on at 900rpm and not move at all but the car seems to shudder and seems as if its idling roughly.
other times there is no issue what so ever.
 is this the ISV??
its not bad (yet) but just wanna know what could be wrong or going wrong

thanks

[snozan]

hello [people

 my abf will sometimes idle spot on at 900rpm and not move at all but the car seems to shudder and seems as if its idling roughly.
other times there is no issue what so ever.
 is this the ISV??
its not bad (yet) but just wanna know what could be wrong or going wrong

thanks

With or without AC?

[vwwvgolf]

no A/C

[RadoABF]

I would give the isv a clean mate, take off the hose, undo the Allen bolt holding it on and pull out, clean thoroughly with carb cleaner, if you can leave it connected up and clean with it buzzing away so it's more effective

[andy_k]

I'd run a bottle of injector cleaner fluid through as well

[vwwvgolf]

cheers guys, ill try it over weekend 

[itavaltalainen]

what engine (code please) have you got?

1.8 aam, abs, adz are notorious for having broken gears on throttle idle mechanism... which would give you exactly the symptoms you have now

[snozan]

what engine (code please) have you got?

1.8 aam, abs, adz are notorious for having broken gears on throttle idle mechanism... which would give you exactly the symptoms you have now

I guess ABF

my abf will sometimes idle spot on at 900rpm

[itavaltalainen]

d'oh... yeah i'd go ISV then.... other option would be potentiometer on throttle but that'd cause otehr issues too

[snozan]

You could do a quick check to see if your switch for throttle valve is working properly. Its a basic open/close switch, check with a multimeter. If that one is broken you can get strange idle. Since it tells when the throttle is shut and when to idle.

If it's broken you might have a problem since the dealer canceled them 2007 - But i've come to understand, UK is where the ABF parts are