Greetings: I've got a '92 Accord (175,000 mi). Have been trying to
really give it a thorough upgrading without a total overhaul, and just
wondered if either or both of the following two things could possibly
increase engine performance and longevity: (1) valve adjustment
and, (2) a new O2 sensor. Neither of these issues has ever been
addressed over the life of the car. I have anecdotally heard that
a valve adjustment and/or new oxygen sensor could enhance
performance, but would like to hear it from someone out there in
the real world before shelling out real money. Thanks. - Paul