problem on idle

[cliosportap]

hi friends i have problem on idle but the problem is not the idle speed controller we checked it
as i can describe, when i stop on red lights there is no problem on idle and it stays on it way
but while i am going downhill and take the gear off the idle shakes and after i stop the idle get constant again
i think the intake manifold get air somewhere else while riding but i checked all the hoses and gaskets on manifold and cant find anything
what can be the reason of it i want your help

 

[cliosportap]

anybody else ?

 

[shadowsun]

I assume you have a 172 or 182 from your profile?

All Clio 2.0's have a lumpy idle and others will confirm this, but I'm bot quite sure I understand your post. It idles fine normally, but when you drive its lumpy?

 

[cliosportap]

yes it is 172 ph1
its only lumpy when you drive when you take the gear off
but i cant find the reason

 

[cliosportap]

no one can help?