I just did the timing belt when I replaced a leaking can seal. I bought the car for $350 because it was puking oil from a cam seal. It does not seem to give any kind of read on what cylinders are missing. I will check for oil in the spark plug tubes tomorrow. Wouldn't there be a cam sensor code if it were a cam sensor problem?
As for cam timing I checked it three times before putting everything back together. It also missed before doing the cam seals and timing belt. How may tabs should be on the crank pully?