I hear big vacuum leak on 2001 elantra not any hoses

check for vacuum leaks in the small rubber hoses.

Hi there:
One of the best ways to find a vacuum leak is to start the engine, and spray WD40 all around on the intake manifold, and the vacuum lines. If you hit a vacuum leak then the engine will speed up for a few seconds. It will normally be a bad hose, or a hose that has come off.

On the air blowing out of the dash there is a very small vacuum line that comes out of the dash and attaches to the engine. If this line is off or otherwise no vacuum to it the air will do just what you described. You should track this hose down and see if it is hooked up properly.


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i suspect it is not a vacuum hose leak as that would give you poorer brakes and shouldn't slow down the engine..why do you think its a vacuum hose leak

There is nobody online that can tell you where your antifreeze is leaking from. If the hoses are not leaking, it could be anything from a leaking radiator, to a bad water pump, a breach in the head gasket, or a hole in a freeze plug. You simply need to LOOK to see where it is leaking from. That cannot be done over the internet.

You may have a vacuum leak or a hose that came loose.

Sounds like a broken vacuum line,Donna. Makes the computer go crazy.Check
all vacuum hoses.A leak that bad you should be able to hear.
It might be something else,but I'd check vacuum hoses and connections first. (:^) don-ohio

I would check all wires and hoses that has been disconncted during performed repair.

The hose will have to be replaced. Usually just a wrench is required. You can go to autozone website, register, login, and view a free online repair manual for your car if you need it.

was the fuel fill cap ever left off or fueled while running. this would trigger that. a big leak could possibly be a broken vacuum hose. that would aslo explain the iac code.

Black rubber vacuum hoses are often a cause for heater failure, especially in older cars. Anytime the hood is up and engine is cool start inspecting and following these hoses as far as possible. They should be firm, springy upon pressing and fairly smooth. If soft,crumbly,powdery,oily, stiff/inflexible etc. they should be replaced. The ends should fit very tight over their fittings. Vacuum hose is not expensive so just replace any which are suspect. You may get lucky and find a leaker. If not you have eliminated a future leak. Be sure to mention the vac. hoses have been replaced if you need to write back and ask more questions.