This episode is a little late but better late than never. Right? When I bought the FJ it had a P-code for a cam/crank sensor fault. So I tore apart the FJ to see what I could find. Turns out the chain was stretched. The tensioner was all the way pushed out so it couldn't adjust the chain any further and it was just enough out that it ran ok, but the fault code was triggered. It looked like the previous owner never changed the oil, or not often, and it was used to plow his long driveway.
Installing the new chain was a little more challenging than I thought it would be because I couldn't get the timing marks to line up at first. But I kept working at it. The marks finally lined up perfectly and the engine runs like a dream.
