hissing noise...

[gensic11]

does anyone else get a hissing type of noise from their explorers? it sort of sounds like there would be a small hole in a pipe letting out air.. sounds like someone hissing loudly and kind of sputters in and out sometimes..
it ONLY does it at Idle - and no it's not in the engine or IAC.. it sounds like it's coming from under the truck. i had a ford mechanic say it's normal for explorers to make the noise but i disagree - the trucks don't come off the lot making hissing noises - it DOES NOT affect anything at all .. just real annoying while sitting at a drive through having to listen to the hissing noise..

when i put it in park it seems like it goes away sometimes.. but then there are other times that it doesn't.. ONCE i hit the gas pedal and drive off - it completely stops and sounds like it should.. any suggestions?

 

[memhorn]

I wonder if what you are hearing is from the transmission -- something about the hole in a separator plate being too big or too small. I have it, more of a "whistling" that is very noticeable in the drive through at Whataburger. There are posts about this: bottom line is that it doesn't hurt anything.

Good luck.

 

[gensic11]

memhorn glad you posted that.. i remember reading that a long time ago but couldn't get much information out of anyone. i would love to get this fixed considering how annoying it is listening to it at drive throughs.. does yours go away when you hit the gas??

 

[memhorn]

It seems to go away, but that might just be due to the road noise masking it as I pick up speed. I talked to one dealership about the problem and they said it would cost about $1000 to fix -- that was in line with the other posts I had read read here, that it was a BIG, messy job.

So, I am living with it.

 

[Kar21focus]

I heard a hissing noise just when I was hitting gas pedal. I thought it could've been a brake booster or a type of vaccuum leak. It turned out to be an exhaust leak near the Y pipe and O2 sensor. 2008 4.6L Eddie Bauer Explorer 166,100 miles.