Idle wont keep stady when cold?

[Jonas_R]

When my car is cold (1992 s2 coupe) the idle goes from around 1000-700/600 rpm's. When warm it stays around 800/900 rpm's, cant remember if it is 800 or 900.

Any idea what can cause this?

Did put a HKS filter directly on the MAF see pic, if this could have any effekt?



/Jonas R.

[91_S2]

You might want to check your idle stabilizer valve. Clean it with carb or brake cleaner. Relubricate it. The ISV is back by the firewall. It is a small cylindrical part right behind the throttle body.

[S2 Ant]

Also check any vacuum hoses as i believe they would also cause an idle problem

[Lee]

It was the connector on the ISV causing my idle problems. Cleaned the contacts and all was better at idle.

[Ski]

Hi, i seem to have the same problem and its growing worse, idles at 1100, sometimes dropes after a rev or two.

As you all know im a mechanic GOD.. when i sleep, but during the day i seem to forget everything regarding mechanics :/ honest

can i clean this ISV with the same stuff i clean my MAF ? (i forgot the name of that solution again)

And, I dont suppose anyone has a picture of where this is located for me otherwise i will start unscrewing random objects and cause more harm then good

[Ski]

also what do i re-lubricate it with ?

[WabTheKing]

can i clean this ISV with the same stuff i clean my MAF ? (i forgot the name of that solution again)

answer above: duno




And, I dont suppose anyone has a picture of where this is located for me otherwise i will start unscrewing random objects and cause more harm then good

answer above: here

[RIX]

yes you can,it´s called IPA,or at leats i clean it in that.
Regards
RIX

[rotoryboy]

That's the stuff
I.P.A

[Ski]

yup still got some ipa left.

Thanx for the Pic, ive located this strange looking once-unidentified object

So i just unplug the hydrolic looking device and soak it in ipa? or do i just clean the electronic connetion to it?

[WabTheKing]

what about this IPA? ive used this to flush my system before

[rotoryboy]

Far more fun, just don't mix them up,lol.

[Ski]

Do i just unplug the hydrolic looking device and soak it in ipa? or do i just clean the electronic connetion to it?

[WabTheKing]

take it off, clean the connections, and spray/rince the inside i would imagine, ive done it with wd40 in the past. just air pipes on it so nothing to leak, make sure you tighten them jubby clips up tho when you put it back on otherwise you will find yourself with a boost leak my friend

[Ski]

ohh.. cool.. but actually drownding it in ipa is a no no?