zackanderson01

if i cover it with my finger the motor stalls. 1992 audi 100 cs quattro 2.8l. crankshaft breather hose

varia

its a plug

zackanderson01

then why does it stall when pluged? is it a port for a air meter or something?

ncoupe

The line is part of the brake servo vacuum circuit. At least one section of it is made out of hard plastic, which I broke when I took off the intake manifold to replace the gaskets on the top end and the oil pressure valves. I had to patch it up, because you cannot find a replacement. In the next few weeks, I will replace the valve cover gaskets, and then I will do the experiment you did and see whether my '92 stalls as well.

zackanderson01

The problem I'm having is the motor sounds starved at idle. Give it a little gas she sounds great but chugs and supters at idle. I was thinking the idle air, but if I unplug and start, the idle rises bit still chugging and returns when plugged in. If I unplug while running Nothing seems to happen.

Rusty Spokes

Could be some adaptive memory in your ECU..you been running with an air leak.

Cap the leak. Disconnect the battery. Go have a beer. Reconnect the battery and reset you clock and radio.

Go drive the car for a while. See what happens.

zackanderson01

plugged hole, disconnected battery, rest clock and radio. running much much better

Rusty Spokes

It should improve the more you drive.

zackanderson01

Its actually came back a little bit, im thinking 02 sensor, also lots of white smoke on throttle.