Well, I can tell you this, I don't like wrenching on these newer cars. I don't see how a fat guy can work on this stuff! Laying on he rad support to work on the back of the engine is a pain. What size is the tool that pops off the fuel rail connection. All I have is a 3/8 and it does not seem to work. I got all the elec connections off the drivers side so Im ready to pull that cover. I think that is the side it is making the noise.