I have noticed something over the last 2 weeks that seems to be coming from my AF1. When I takeoff from a deadstop there is a low grumbling noise almost like it is rubbing on the hood, but it's not. When I say takeoff I'm talking about a normal acceleration, not a punch it to the floor takeoff. I accelerate not slowly, but normally to avoid eating up alot of gas, at $2.90 a gallon who doesn't. Just wondering if this is normal or anyone else is experiencing this or what it may be if not normal. Thanks

 

I have been experiencing a similar sound with my stock intake. Sounds like something is rubbing upon takeoff, or stopped while in park. I haven't gotten around to figuring out what it is though.

 

Hmm.. I haven't experienced anything like that, though I've only had it on for 2 months now.. I'd be interested to know what it could be..

 

Recheck all the connections and mounting points. Also look at wiring harnesses and see if they are rubbing somewhere?

 

$2.90 a gallon...I'd kill for that!

$3.37 here in Oregon