Making Siren noise?

[xpreciousangelx]

I'm not having good luck with my 1998 Ford Explorer Sport... I've had it since August 2005... but just recently it makes this siren noise, I actually thought it sounds like a tornado sound. It's like buzzing, and the RMP are normally at 1,000 when i'm just pushing on the brakes.. but when it starts making this noise it goes from 1 down to 500 then up to 2,000 then back down... and keeps doing that until i push on the gas. it also feels like it's going to stall.
if anyone have any idea what this is could you please help me out? thanks

 

[exploded99]

Your first post, welcome to the site!

I think what you are describing are the classic symptoms of a bad idle air control valve. Here is a link that shows you pictures of what it is and where it is:

http://www.explorerforum.com/forums/showthread.php?t=84220

You may have to cut/paste it.

They can be cleaned, but when they start to howl, it's time for a new one. If you hunt around you should find one at the parts store or online for 60 dollars or so.

Good luck!

 

[dogfriend]

Wooooo!

 

[xpreciousangelx]

Hey thanks,
the link helped me a lot. It happened again today, but then went away. My check engine light is on, and the dude from AutoZone checked it and it's my control value.
Thanks I'll need the luck.