I know I've posted a bunch of threads with problems I have but here's another. My car sometimes makes a knocking noise and it comes from the back. I remember I was at the burger king drive thru and I had no music on and the window open and I was waiting on line and I heard 3 knocks come from the back of my car somewhere. I had this happen another time just sitting with my girlfriend in my car in a parking lot and it happened for the first time cause I remember thinking someone was actually knocking on my car lol. So anyone know what this is from? Thx

 

Yea, there is a writeup on this somewhere...Its normal...something about something in the car running a self test...but dont worry its fine

 

The first time I heard it it scared the crap out of me. lol. I don't know what it is but I've also heard it was normal..

 

EVAP Solenoid

 

Well it's gay. haha