My 2006 toyota sequoia (87000 miles) wouldn't start one morning. It ran fine the night before. It actually did start, but sounded like it ran on 1 cylinder and made a awfull clanking sound, like the engine was coming apart. Initially I thought it broke the timing chain. Shut it off. Waited a few minutes and tried it again. It ran fine , like nothing ever happenned. It has run fine ever since. Had them electrically diagnose it, but it didn't show anything. Also the "check engine light" never came on.
Any thoughts