Wish we could be there to hear it so we can be sure, but the wooosh sound is just the water evaporating when it hits the exhaust. its evaporating almost instantly causing the "woooossshh." An exhuast leak will usually sound like lifter tick...but since 4.6's have no lifters you can identify it pretty quickly. Just to be safe you may want to ask someone some time to crawl under and check it out for you...02LaserRed2V said:Scary? Hell, yeah! When I heard the pipe crackling, I thought it was going to explode!
But yeah, it could very well be the AC. I'm still unsure on what is causing the "whooooosh" sound while driving, though.
I'm starting to believe I have an exhaust leak...
maybe a hissing noise is normal, but not a grinding and whining.White Stang said:The noise you are hearing is the condensation boiling on your cats due to how hot the cats get. I would not worry about it
02LaserRed2V said:Just took it for a drive again. The noise now seems to be even worse!There's quite a bit of whining and grinding to the point where I can almost feel it on the pedal. Much of this is happening while driving below 25mph, especially when decelerating. I originally thought it was the exhaust, but is now starting to believe it's the gears and/or tranny? I've always had slight gear whine after getting the 4.10s installed, but it was faint and only happened at high speeds.
Look like I'll have to push my dyno appointment this Wednesday back to get this taken care of first.
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