i have a 94 F-150 5.0L. when i first start it, i hear this air rushin, but avter it idles down, it stops, so i dont have enuff time to tell where it came from.... ne ideas...

 

Mine does the same thing. Isn't it just because its warming up at a idle it's sopposed to warm up at????

 

well.. ive had it for a few months and i just noticed it day before yesterday and i dont c how i missed it before

 

I'm not the brightest with the truck, but when you start it, see where the idle goes, then when i goes to normal take it back up and see if its the same sound. I'm pretty sure its just because its warming at a high idle like sopposed to.

 

Fan clutch is making the fan turn. Depends on temp and humidity on mine. Sometimes it does it, sometimes it doesn't.

 

oh, ok..... yea the temp droped like 20 degrees in the past week.... so i guess im just being paroniod