2001, firebird, #3 Misfire? what can it be??...

[golden dog]

...HELP............???? I got cylinder #3 misfire, I already changed wire-set, spark plug , and get ready to change coil path . I wonder if there any way to check what it really gone bad, beside kept changing parts, like what i'm doing? I'm trying to switch cylinder#3 plug to cylinder#5, run the code reading, said po 300, multiple cylinder misfire.

 

[Violator]

This could be a bad injector or injector connector. If you have access to a decent scan tool you can actually watch each cylinder misfire and turn each injector on and off. Could also be a bent pushrod, bent valve or even a bad rocker arm. Run a compression check and check fuel pressure. Ohm out the injectors.

 

[b1er]

cracked plug?...broken valve spring?.....my personal fav the bent pushrod...