Congratulations on your purchase! What color did you get?

I'm currently having the same problem on my '93. I checked my codes and it blinked me 'left knock sensor'. You're supposed to replace them in pairs. I ordered two from Subaruparts.com for under $80 shipped. Haven't had a chance to put them in yet. Do a search for 'knock sensor' and 'check engine light' you'll have lot's of entertaining reading.