previous owner has this strapped to AC line, and plumbed into vac system. it holds a vac, and if i unplug it the vac escapes. if i cap off the line nothing seems to quit working.

i can't find where it was originally mounted, if it ever was. Anyone else, especially 01's have this ?

 

i think.. but not for certain.. that its the vac that controls the air vents in the truck.. my old truck had that and thats what it was for

 

Almost looks like a cruise control vacuum servo. Is there a cable attached to it? Any wiring?

 

thats a reservoir but preatty sure that isnt for the truck my friends cavilier had that same style one i know mine is under the cowl cover by the windsheild wiper arms

 

no, the cruise control server appears to be mounted under the battery on drivers side. this canister has only a vacuum line to it.

i also have a square shaped vac canister under the cowl. it is also intact and hooked up and holding vac ok.

the 2 plastic mounting feet are broken out, but when i look for the original mounting location (holes, rivets, paint scratches, etc), i cannot find any. i'm wondering if this was added for some reason.

 

THEY PROB DID IT TO FIX THE AC DOOR PROBLEM. AT HIGHER ACCELERATION THE DOORS WILL SHUT AND LEAVE YOU WITH NO AC. THERE ARE SMALLER CHECK VALVES THAT WILL DO THE SAME JOB BU T THE p.o. MIGHT NOT HAVE KNOWN THAT.

SORRY ABOUT THE CAPS I AM AT WORK AND THATS THE WAY OUR COMPUTER IS SET UP...

 

thanks.
am i correct in thinking that the check valve allows the vac to travel to the ac and htr controls and get trapped there, so that when the engine is pulling hard and the overall vacuum drops the check valve prevents the vacuum pressure from escaping from the controls ? So then my additional vac reservoir just holds additional volume, (ha increased volume of nothing) hoping to sustain the drop in vacuum within the lines for a longer period ?

i think i will remove it and cap the vac and see if i can recreate the original problem they must have solved.

anyone have a pic of what a check valve looks like ?
how are the in/out marked ? which side goes to the engine ?
would one check valve cover all vacuum operated controls, or does it require multiple check valves ?

 

that looks like a float for a toilet tank my good friend.which line does it tie into?i was going to do the same thing because i have a leak somewhere bettween the fire wall and the reservoir under the dash just ahead of transfer case shifter.

 

I have an 01 and that is def not under my hood and i got a full load it looks like someone put that in there (previous owner maybe)