Question about 2001 Kia Sephia

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Vacuum leak ,small leak where is the best place to start?

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The best method is to go to the Auto Parts store and get a can of Starting Fluid..This is basically Ether..This is a very volatile substance that is easily sucked into a leak and causes a dramatic change in engine running condition.

With the car at idle spray carefully around the base of the carb or throttle body, at the area where the manifold meets the head, around vacuum hoses and any connections either below the carb base or after the Mass Air or Air Flow Meters.Any noticeable change in idle speed or quality will indicate a vacuum leak

Posted on Jul 12, 2010


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1991 chevy pickup v-8 engine

Sounds like some type of vacuum leak. I have seen either small vacuum hoses off the intake or an actual Intake Gasket leak... Best check out is a Smoke machine test hooked up to any vacuum hose.. if not available , spray areas of hoses / and around engine intake with some type of cheap spray Throttle Cleaner .. small bursts.. if you have a leak and it sucks in the vapor it will make the engine stall/die. That will give you general area to start looking ..

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If your engine is idling to fast there is a chance you may have a vacuum leak some place so I would start out by looking for a vacuum leak. The best and fastest way to check for vacuum leaks is to buy a can of break cleaner and spray all of your vacuum lines while the car is running. If you have a vacuum leak and the spray hits it the car will either idle down or idle even higher. Either way you will know you have found the problem. Another thing that you want to check is the vehicles throttle positioning sensor. This sensor controls your cars idle and if it is bad it will cause a fast, slow, or rough idle. I hope this helps you out.

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The easiest & quickest way I have found a vacuum leak and I am in the business is to get a can of carb cleaner. When the engine is running start spraying along all your vacuum lines and connections. Also along the throttle body or carberator and around the intake manifold. As you're spraying if the lidle of the engine changes then you have found the general area of the vacuum leak. From there on you can begin to narrow down the location until you find the source of it. I hope this helps and good luck.

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The purge solenoid is by the engine and is connected to the vacuum system. Check the vacuum lines going to this and the lines that may be connected to the vacuum port it comes from. Check for seals on the solenoid if it is directly in the intake manifold. Other things to check are the lines (plastic) that go to the charcoal canister and fuel tank. If the light has been on for a while I would start with the pugre solenoid. If you have a vacuum leak there it would go from small to gross.
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Why would my heater change over to defrost when i excelerate

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Trace vacuum hoses and inspect for loose connections, cracked hoses, etc. Often the leak (hissing) can be heard. The leak could be in any number of places. If you can't find the leak yourself, best bet is to take it to a shop.

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1 Answer

My taurus is idling really low and almost stalling

First of all it really could be a bunch of things. What I would do is start narrowing down what the problem could be 1 by 1. I have 2 taurus's 2000 and 2001 I had the low idling problem in my 2000 I found a small crack in one of the vacuum lines. I replaced it and problem vent away. But like I said it could be a number of things. I would start the car and open the hood and listen for hissing of a vacuum line first. If you have a stethoscope they work the best to help find small leaks. If that isn't the problem I would next check to see if the pcv is clogged... Check to see if the air filter is dirty... check spark plugs and check spark plug wires.. Try these and see if this help but in my opinion it is mostly a vacuum leak in one of the vacuum lines or a vacuum leak at the intake manifold

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good luck, hope this helps....

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