Um, this feels like it should be obvious. One that isn't on, fine. But you could injure yourself if it is otherwise
A vacuum hose
check for a vacuum leak, i have seen some with loose carburetor bolts which make a vacuum leak. could be a bad hose, on the distibutor, maybe a bad power brake hose, could be a number of things
Using a set of gauges put the blue hose on the low side (larger hose), put the red hose on the high side (smaller hose), put the remaining yellow hose on a vacuum pump and let it vacuum for about 1-hour and if it holds then recharge the system adding both freon and oil.....
Take a vacuum hose off at the intake manifold and put a vacuum gauge on the port, then read the vacuum with the engine running.
Disconnect the hose and put a dinner knife down the hose and the weight of it should shift whatever is stuck if you "wave the hose" gently. Alternatively, if you have a vacuum that exhales air, you can try that as well.
you must first find out which vacuum hose is leaking or is bad then you simply measure the hoseand go to the auto parts store and tell them how much hose you need. all volkswagen vacuum hoses simply pull off so pull of the old one and put on the neew one and you are ready to go... To find the leaking hose start the car and with the hood up inspect all hoses for cracks or breaks then listen for any loud hissing sounds these sounds will be coming from your broken hose
you can take oil and put it where you suspect there to be a vacuum leak. If there is a leak the oil will be pulled into the engine or hose
The PCV valve is located on the top of the valve cover. To test the PCV valve, start the engine, pull the valve out of the valve cover and put your thumb over the hole in the end. If you hear a little click, then the PCV valve is good. If there is no vacuum at the hole, either the valve is bad or the hose is bad. To see if the hose is bad, pull the hose off and put your thumb over the end. If there is vacuum, replace the PCV valve. If not, replace the hose. It's important to note that PCV valves are sized for specific engine applications. The wrong PCV valve for an application can flow too much or too little air causing driveability problems.
You can get a 1996 Chevy Corvette vacuum hose schematic diagram at most Chevrolet dealerships. Your local library will have Chevrolet Corvette service manuals with the diagram.
You just put the crawler hose into the pool vacuum outlet and off it goes. It's just a mechanical vacuum that saves you doing the job.
Could possibly be a messed up vacuum hose. Not sure where it is located.
Yes, and that is bad.