Please bear with me...I'm not very mechanically inclined...

I have a 02 GT with a k&n intake... There's a 5-6inch hose about half way up the intake pipe on the right side that goes and connects to a small black box (sensor ?) which is connected to the plenum I believe.......

Well that 6 inch hose on mine is massively cracked and leaking.... Can anyone tell me if I can find something like that at autozone or do I need to go thru a dealer ?

What's the purpose of the hose / black box anyway? Mine has been leaking for quite some time...

Thanks guys.

 

that's the idle air control valve's air source. with a giant crack in it you have a massive vacuum leak which will eventually cause your car to start throwing CEL's for lean conditions and faulty IAC valves.

You can use any hose you can get to fit over both ends. The little black box is a filter and noise reduction device.

 

Ack ok.
The hose only has about a 3/4" piece of rubber left holding it together and is split open the rest of the way around the back side of it.. I suspect it's been that way for the entire year I've owned it.. There has always been a sort of whistling noise at certain points during acceleration which I assumed to be the k&n. And occasionally it would throw a code that I blamed on the exhaust...... Guess that's what I get for assuming things

I'll get that fixed asap.. Thanks man.

 

Get that fixed!

Like r3d said above it would cause the check engine light to come on because of lean conditions. Your oxygen sensors are what monitor the air and fuel mixture and these are screwed into bungs on your exhaust. So the check engine light wasn't exactly blaming the exhaust it was most likely saying that the air fuel mixture was not right.

 

3/4 heater hose will work just fine. Its a good tight fit and you wont any clamps.

 

thanks everyone... I replaced the hose, reset the check engine light, and she's purrin like a kitten.

 

I also have the k&n intake on mine and that exact hose burst on mine also, so i changed it and its like the hose heats up and when you rev the engine that little hose just pinches shut, i don't think that is normal, what would cause that hose to keep bursting?

 

That's not normal, you might have too thin of a hose there, an IAC problem or a air filter that needs replaced. That hose directs air from the intake tract (between the filter and the throttle body) into the IAC. The IAC uses that steady supply of air to control the idle of your car with a little valve. That valve lets the correct amount of air sneak past the closed throttle body and into the intake manifold to keep the car idling correctly. If the throttle blade is opened (giving it gas) the IAC should be closed and air should be coming through the intake tract? You're getting heavy vacuum through the IAC when you give it gas and let off? The hose should stay round and let the air in through the IAC when the throttle blade snaps shut (let off the gas) but yours is collapsing under vacuum (until it settles in at idle I am assuming). I am guessing the heat from the engine combined with constant flexing of the hose is causing the issue? Get a new bit of good heater hose to replace the broken piece, make it as short as possible and clean out your IAC with some carb cleaner. Then lubricate the little plunger shaft in the IAC. Then get a new PCV valve and refresh your KandN (but not too much oil on the filter)...while your in there, you may as well clean off the MAF wire with a gentle hand, MAF cleaner and a Q tip.

 

there's a problem with something... you shouldn't even be able to collapse the little hose in the first place. That's normally a pretty big tube and it leads to an even bigger one. There shouldn't be that much vacuum there to begin with. Make sure the hole into the intake snorkel from the IAC bung is full diameter and not restricted in any way. Perhaps there's a little flash around that area from a mold seam that's causing more vacuum in the hose than normal. Just a thought. Also, if you collapse it, replace it.

 

The original hose that was on there from ford is the one that burst, the one i replaced it with was a hose with the steal mesh in the middle that was suppose to be pretty tough, it hasn't bursted like the original one instead it just pinches shut, i guess i will try what you suggested and see what it does. The only thing is, is that it hasn't ran bad, or shown any signs that something is wrong and it has been like that for a long time, i actually stuck like 5 hose clamps around it to keep it round, that way it couldn't pinch shut, (not sure if it was a good idea or not but i did it anyway) i keep the filter clean on a regular basis so its not the filter, i have never changed the pcv valve on it cause i can't find the damn thing so if someone could assist me by posting up a picture of where it is located i would appreciate it, how often do you need to change them, the car only has 51000 miles on it