That is the vacuum supply for the HVAC control.
There is a vacuum problem to the internal vent control assembly. Either a vacuum leak, missing hose, or blocked vacuum port is not allowing vacuum to reach the ports of the door controls that direct air flow inside the HVAC box under the dash. Check for vacuum at the control assembly, and then that the assembly is porting the vacuum to the control pods.
I am not sure what you mean by reconfigured. If the cruise is not working the first things to check are the vacuum supply to the servo and to check the pcm for trouble codes.
the vacuum hose connects to the airbox
It all depend if it is vacuum operated or electrical. If it is vacuum check the vacuum line attached to the intake manifold, it might have come loose. If its electrical check the heater control panel.
You have a leak in the vacuum supply to the ac control.
It goes to the ac/heater control head.
When the vehicle is under acceleration it doesn't supply vacuum. The vacuum canister or reservoir holds a vacuum supply to operate vacuum operated accessories until the engine regains vacuum.
Vacuum lines supply vacuum for various functions.
The EGR (Exhaust Gas Recirculation) valve opens when vacuum is applied. The EGR vacuum solenoid opens and closes the vacuum supply to the EGR valve when it is commanded to do so by the ECM (Engine Control Module).
Under the hood at the center of the firewall, there is a thin rigid black vacuum line connected into either the vacuum manifold or into another rigid tube... the other side goes into the firewall. from there it goes behind the dash, right behind and above the radio. then it plugs into a veresser right behind the glove box (if you pop out the glove box door, you will see it, its right next to the seatbelt control modual) from there the vacuum supply hose is WHITE, and this goes to the manifold at the back of the climate control switchbox.
Ok, on my 99 Cherokee Sport I found that the vacuum lines along the inside of the passenger side inside fender wall to the Cruise Vacuum Module. The line continues on into the grill area and ends. On mine the end was open, causing a severe vacuum leak! Plug the end of the line and the cruise, A/C, heater, etc. all work fine when you accelerate. I don't know why the factory overlooked this?AnswerI've heard that you can add a vacuum canister in the line to act as a reservoir when extra vacuum is needed. AnswerThis occurs because the climate control doors(that direct the ventilation in the car) are vacuum operated, using intake manifold vacuum. The default(no vacuum) position directs the air to the defrost outlets. When you accelerate, the manifold vacuum drops below that required to operate the doors, and whatever you've got the temp set at blows out of the defrost. When you take your foot off the pedal, (or release the cruise control) the vacuum quickly recovers and the ventilation returns to normal. This is a design flaw, as far as I can tell, there is no fix. AnswerCould also be a vacuum leak. same thing happened to me on my Cherokee (xj) a while back AnswerWhile this might not be correct for your Jeep, I'll offer it anyway. On my Dodge van, there is a vacuum check valve in the line which feeds the climate controls. If it leaks, the controls will follow the engine vacuum and air will come out the defroster on acceleration. The idea is that since the climate control lines should be static and non-leaking, the manufacturer can use the lines and manifold as its own reservoir during periods of low vacuum.
It all depends on what of the climate control that is sticking:Stuck on defrost only - that's a vacuum 'switch' under the dash. Find and follow the vacuum hoses , maybe up above the passenger side dash (that's where the vacuum line enters through the firewall.Stuck on a particular temperature - that's likely to be due to a failed temperature blend door actuator motor. A very common failure on Taurus/Sable climate control systems.See "Related Questions" below for more
You have a bad vacuum reservoir or leaking vacuum line. Vacuum is usedd to control the air duct doors in your system and when you accelerate, the vacuum supply is greatly reduced...causing the duct doors to "default" to the defrost position.
Need to know which one you are looking for or, what does this vacuum control valve control.
I can only think of one reason you would have the vacuum pump and that is because you have a diesel engine in your caddy. The Oldsmobile diesels they used in these cars had vacuum pumps located in the rear of the engine in the same location you would expect to see a distributor. The vacuum pump was used to operate the cruise control and the climate control system. It also released the parking brake when you moved the shift lever and provided vacuum to the transmission.
I would look for a Vacuum leak possibly under hood. Does your Cruise control work?
There is a vacuum switch located behind the dashboard climate control panel. When the vacuum system develops a leak you are unable to change the flow diverter. The part itself is cheap, I paid $17 at a dealer for it but you do have to remove the control assembly to change it out. If you listen carefully you should be able to hear the vacuum leak.
4 how to repair climate controlI have a 95 park ave and my climate control broke and the heat stayed on, so I purchased a new climate control from a used parts place for around $70 bucks and installed it my self, you will need to take off the front dash pannel and unplug the old one and insert the plug into the new one. The climate control on my 92 PA was not working properly. I found that the vacuum line going through the fire wall had got disconnected. Connecting that solved my problems.
give up...plug them.
You have to find the leak in the system. Once your entire vacuum system holds constant suction, the pump will cut off and only come on when needed.
where is the 2002 oldsmobile alero cruise control vacuum line?
My guess is its vacuum related. High vacuum at idle and low vacuum during acceleration is normal. Look for a vacuum leak