1983 911SC vacuum advice needed

[Vin-barrett]

Hiya
I'm a new 911 owner. I was just pokin around the engine and found that my deceleration valve has been plugged. Is this common to do? Does anyone recommend putting this back?

I appreciate the help

Thanks
Vinny

[Vipergrün]

Many times the decel valve is plugged to solve a problem with a high idle, like at a stop light with the car in neutral. The car will come to a stop and the idle will hang at 3-4K RPM's and may or may not come down.

[jdowty3]

Depends why it was plugged. If it was sticking, as mine was, don't reconnect it. If it was sticking, you'll pull up to a stop and the idle will drop to about 1500 or so and may even start to rise.
The decel valve just lets the motor do a slower decel when you lift off the accel pedal. I removed the AAV and the Decel valve and left only the AAR.

[Vin-barrett]

Thanks for the replies fellas
Im going outside right now to stick it on and see what happens

[Vin-barrett]

Just plugged it in and yea it sticks. Seems to come and go though. Any thoughts on spraying carb cleaner in there might help?

Thanks again