My Legacy sedan has had the "Check Engine" light off on for the past few months. Each time I took it to local mechanic, he said the code was for the "Evap System" he fixed it but the light came back w/in a day or 2.

Most recent glitch was when I was on the highway and it really began to misfire----------------the problem went away and then it came back w/ a vengance----------to the extent that I was feeling vibration in front wheels (I feared I had flat tire. It cooled off for 30 minutes and I cautiously drove home on back roads.

I have:

got new plugs

New ignition wires

New fuel filter

New air filter

***Finally, this is probably unrelated, but I decided to throw it in. There is a high pitched squeal from front end when I am in reverse. This also happened in drive but local mechanic found small stones in disc area and the "going forward" sound did get eliminated.

PS It looks like I'm headed to the Subaru dealer---good bye vacation fund money!!

Thank you

car has 125K

Which plugs? NGK "V Groove" are the best suited.