Picked up a new O2 sensor and figured I would put it in before my next emissions test in a few days.
Is it easier to roll the engine forward to get at the O2 sensor in the exhaust manifold, or is it easier to get at it from below reaching up? Guess some PB Blaster and an over night soak might help to ease it out.
Also, should I disconnect the battery for a 1/2 hour to clear the computer and get it to re-learn with the new O2 sensor?