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How to change vacuum hose - 2003 Subaru Forester

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Start engine look / lessen / and feel for the vacuun leak.
if you find it - take a small peice to the auto parts store and buy enough to do the job.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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2002 mercury mystique vacuum leak

A good way to find a vacuum leak if engine cold, start and use starting fluid in areas where vacuum lines run. If the engine changes in RPM, increases, you want to check those hoses. Can also pinch hoses one at a time and listen to engine, it may change how it runs.

Nov 09, 2016 | Mercury Cars & Trucks

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How can I fix the heat on my 1984 Oldsmobile Delta 88? Could it be related to this?

If that valve on the heater hose is not opening and closing, check the hose going to it for vacuum when you actuate the heater control to the warmest position. If the vacuum is present, pull the hose loose and watch for the actuator to move. If it doesn't, and vacuum is present, push the actuator to see if it's stuck and have an assistant check the vents while you hold the actuator open to see if the temperature changes. If it does, replace the valve. If no vacuum is present, then you need to trace it back to the control valve which is vacuum operated make sure there are no cracks in the hose, and check for vacuum at the controller supplying that hose at the controller, and make sure vacuum is going to the controller too..

May 17, 2016 | Oldsmobile Cars & Trucks

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My 2003 caravan wants to studder and u put gas on it dies all sensors have been changed

You could have a vacuum leak , intake manifold , vacuum hose etc. You can check for a vacuum leak with carburetor spray cleaner , spray around the intake an hoses an listen for engine RPM change . How To Find Vacuum Leak EricTheCarGuy

Oct 27, 2015 | 2003 Dodge Caravan

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Vacuum hose

I never heard of a vacuum line going from the throttle body/intake manifold before but I have never worked on a Kia. Disconnect the hose at both ends have some one take you to ace hardware they have automotive vacuum hose by the foot bring your old hose with you so they can cut the proper length and girth of your original hose and pop the new one back on. It might be hard to fit the new hose back onto their fittings i usually lightly oil the surface that the hose goes over with engine oil so it goes on pain free remember lightly oil. good luck.

Mar 27, 2014 | 2001 Kia Sportage

1 Answer

I have a Chevy s10 6 c when you turn it on it has a very high ideal

You may have a vacuum leak ,ie broken hose,base gasket on the throttlebody may be bad. You can check this by spraying carb. cleaner
around the vacuum hoses and the throttle when it is running.
If it has a vacuum leak of any kind the idle will change, if the idle does not change, change the idle air control solenoid.

Jan 23, 2013 | Cars & Trucks

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The MOST LIKELY cause of an engine surging and refusing to idle is a vacuum leak. Check all vacuum line connections. You can also pinch rubber vacuum hoses off one at a time near the intake manifold to see if the engine idle changes, - don't forget to check the hose to the brake booster. If pinching off the booster hose fixes the running problem it is possible that the booster itself is leaking if you can't find any leak in the hose.

You can check for vacuum leaks at the intake manifolsd gaskets and throttle body base by squirting some carburetor cleaner around these areas. If you spray this into a vacuum leak area, you will hear a change in engine RPM.

Aug 16, 2011 | 1994 Chevrolet S-10 Blazer

3 Answers

When I switch fro defrost to ac the airs still comes out through the defrost by the windshield

It sounds like a vacuum hose has come off or broke. Try checking the hoses towards the fire wall under the hood.

May 16, 2011 | 2001 Saab 9-3

1 Answer

I have a 1982 landcruiser - ran fine - then changed the air pump - and now won't start unless full choked and won't idle at all - did i misplace a vacuum hose ? I can't find a vacuum hose diagram anywhere....

Do you mean vacuum pump? If so you probably need to change ALL vacuum hoses. With the new pump comes new vacuum pressures, old hoses will probably be sucked off their pipe nipples or small cracks turn into large ones, one or both of the above will cause severe rough idle and running along with much power loss and fuel mileage will ****. If you have the original service manual on the truck and engine (I am assuming you have the 4.2L straight 6- 2F) it has a vacuum hose routing view in it. good luck

Aug 09, 2010 | 1983 Toyota Land Cruiser

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95 cavalier changed EGR vacuum sensor and EGR valve still get code 32 EGR failure what can i do?

Check for vacuum leaks. Use a can of GumOut to spray around vacuum hoses, while the motor is running, if the idle increases when sprayed on or around a certain hose, check that hose for leaks.

Mar 06, 2010 | 1995 Chevrolet Cavalier

3 Answers

No heat changed thermostat

Are you saying the engine does not get hot or that your heaters are not working..?
If it's the heaters, change the temp control on the dash to full heat, then trace the heater hoses under the hood from the firewall back to the motor. Hopefully this will locate the heater tap. Now if the tap is vacuum operated, start the motor and check if there is vacuum at the small hose connected to the tap. No vacuum is correct. Now change the heater control to cold and there should now be vacuum at that small hose. if vacuum is still not present, or if you have vacuum but it does not go away no matter where the heater control is placed, suspect the control in the dash.. If the vacuum operation is correct, suspect a blocked or damaged heater valve and replace it..

Nov 05, 2009 | 2002 Mercury Mountaineer

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