Sounds like you have a bent axle. Happened to me before.
Try to find which side it is, swap in a good axle to see if that fixes it.
Originally Posted by Milk+twosugarz
Hey wondering if anyone could point me in the right direction here. I'm getting this weird pulsating noise whenever I accelerate (goes away when foot is off accelerator). It's intensity changes with revs. Sound definitely is coming from front end. I'm backfiring a little bit soemtimes also out the rear end. Could it be a misfire and gases igniting in the exhaust system? I changed my spark plugs with new densos the other day and while I was doing that I noticed 2 out of the 4 ignition coils were browned whereas the other two were pure black. Could they be bad? I have no CEL or anything.. I did pull the wires from each plug while car was idling and each time it did sound like the car wanted to stall but maybe they are failing only on higher loads?
I've been to the garage and they've told me it's not a exhaust leak at least. But I'm pretty stumped