Motor blew up today.....need some tuning experts in here.

[lwrs10]

I was under the impression the lean spike was caused from "Fuel during A/F transition period 1 to cause a lean state".

I hope it is too.


And.....looks like a valvespring broke, and the lean spike was not the root cause. Dropped #5 intake valve. Took the valve cover off and noticed the spring and locks/retainer just laying there. Took the drivers side head off and looks like pieces of the #5 made it back into the intake and took out all the other holes too. Even the passenger side spark plugs are all bent up.