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kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

Well, my car has started running like crap when warm so I started poking around under the hood and I came across this loose vacuum line. Don't know if it has a direct impact on my problem, but it should go somewhere.
Despite the big vacuum diagram under the hood I have no idea where it goes. I think it says "intake tube"Any guesses?

from here, top of the EEC valve
http://www.flickr.com/photos/kcoyle2/5487546620/

to around here, kinda, maybe, i guess.

http://www.flickr.com/photos/kcoyle2/5487535652/

The car runs fine when cold. After a certain period if time, maybe 5 minutes or so it starts to run like crap, stumbling and hesitating. gets a little better when in higher rpm's. Its as if the thermostat opens and it craps out? I dunno.

Also-
Cold start-no problem
cold idle-around 1100rpm
warm start-no problem
warm idle- around 900 kinda hunts sometimes. maybe 1-200 rpm
Just runs like crap when driving. Haven't really done any troubleshooting as I'm new to this. Overwhelming at times to say the least.

Kevin
_________________
1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.

Buwani 931 · Joined: 31 May 2004 Posts: 308 Location: Napa California

Check the line that goes to the top of the distibutor. Its first stop should be a tee, think it goes there. Thats the way my 1980 model goes.

Shawn
_________________
1980 931
That's thirty minutes away. I'll be there in ten.

Smoothie · Posted: Wed Mar 02, 2011 2:36 am Post subject:

There're no vac lines to the S2 distributor.
Your line may be for #11 in the diagram below. That temp switch delays opening of the eec valve until the
engine is warm. -Might account for part of your problem because it would cause a small vac leak when the
engine warms and the valve opens..

_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

As always, thanks! Temp valve (11) was where the mystery line went. I just took advantage of some daylight (I really miss the summer) and was able to actually see where it went. Test spin tells me the problem seems to be solved.

Smoothie, did you live on the Island at one time?
_________________
1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.