nikkoa

Hey all.

82 911 SC, This weekend i went through my CIS system to do some spring cleaning when i found several of the hoses falling apart in my hands. My Bentley covers the basic system, but i speculate some things were changed to meet US emission standards (gray market car). There is one hose in specific that's driving me crazy, i cant figure out where it goes for the life of me.

On the back of the throttle body is a vacuum hose, where does it go? As of right now, i removed a 'T' that had been placed on the Decel Valve from the fuel distributor to some sort of sensor, and i connected the hose from the back of the throttle body to the decel. It still runs rough on idle but the car is now receiving some sort of boosted fuel enrichment on warmup (CSV?) still, i cant deny improvements. Any help in this regards would be appreciated!

P.S. if anyone could confirm the CSVs location it would really help me out. Thanks!

theiceman

could it go down to the distributor for vacum advance ?

also you could download the PET off the porsche site which is pretty good with locations.

nikkoa

I believe it's this hose.



Also if that hose doesn't go into the decel valve, what does

theiceman

I think on mine it goes to the distributor

Houpty GT

http://members.rennlist.com/jimwms/CIS/CIShome.html This may help.

There is a hose for the vacuum advance and one for the emissions retard that both run from the TB to the Distributor. The vacuum advance port is going to have 0 vaccum at idle but will develop vacuum once the throttle starts to open.

nikkoa

thanks houpty and iceman your resources have been a great help. I guess i will wait to make any changes, i am pulling the engine soon so i plan on redoing the hoses while i'm in there.