The EHA is located under the airfilter housing on the drivers side. It is a little black plastic rectangular shaped piece, with a two wired plug that is on the firewall side. I was usually able to smell it after I shut off the engine and got out of the car. (Sometimes while driving slow too) There was no evidence of a leak under the car. Once I opened the hood, and located it, I put my fingers under it, and they got wet, and smelled of gasoline. I might have been able to get away with just buying new o-rings for it, but at the time had no idea that those were available by themselves. At least this way, by replacing the whole thing, I was sure not to have it drip onto the manifold again.
"...rationality of thought imposes a limit on a person's concept of his relation to the cosmos." -Nash
04/71 280SE 195k
09 Jetta TDI