2005 4.7L multi cylinder misfire

Oh shit. Is it making any noise?

 

Besides the misfire, I only heard an exhaust leak, but with the O2 error code made me think it was a gasket or possibly a cracked manifold. No broken springs, not sure what happened

 

Not sure how, #6 cylinder is dead, the valve struck the piston, not sure why, spring is not broken, the timing belt was installed about 3000 miles ago.

 

Crazy. Any clue of the origin/event?

 

Besides the bad gas? None. It was driving just fine, I had to accelerate had to merge into traffic and just heard a pop, then the misfire

 

I wonder if its possible that water contamination in the gas prevented compression and lead to the damage?

 

i wonder if a valvespring broke?

 

Timing belt slip?

It's the kind of thing that can happen under heavy acceleration if the tensioner is defective.

 

That’s my thought as well. These are interference engines.