"Roger Long" wrote in message
A plug can foul that fast. It isn't something that always builds up
slowly.
Don't skip that run up and always do it as close to the takeoff point as
the
taxiway layout permits.

I flew back from the beach with the family a couple of years ago. The two
hour flight was uneventful and I parked the plane in the hangar for the
night.

The next morning, I went to fly again and had similar symptoms as you did
except I couldn't clear the plugs. Had to replace the left mag.

So, either the mag failed during my flight back from the beach and I didn't
notice or it failed during the last crank . . . Or perhaps gremlins sneaked
in the hangar overnight. It was a little unnerving to think it might have
failed during flight and I didn't notice.

So, yeah, just 'cause you had no run-up problems during the previous flight
doesn't mean you won't have them on the next.

--
Jim Fisher