[Oldsguy]

Originally Posted by Tucker442

Have you ever seen a 3400 engine break a rocker and bend a pushrod? I've got a 02 that my son drives and he came home one night told me the service engine light was blinking. I scaned it and got #3 missfire. Took a compression test, was ok, checked for fuel in the cylinder, ok then removed the valve cover and found the broken parts, what do you think caused that?? Still has stock airbox and was serviced about 5K before this happened.

Heavy foot?