2012 chevy traverse number 3 cylinder misfire

Has a cylinder 3 misfire checked spark and that's good checked compression it's good. It's a direct injection engine and I don't know how to check injectors. I have a scope any ideas would be appreciated. Another thing is I don't know how to change my old topics to fixed.

ive seen the gdi systems are having issues with carbon building up on the back of the valves and needing a cleaning. gm has a few bulletins on that. scanner offer a fuel injector balance test to start??

It's getting fuel I know that but I don't know if it's enough. I also don't have a bi directional scan tool.

johnathon.balderas wrote: Another thing is I don't know how to change my old topics to fixed.

There's the Edit button at the bottom right corner of the post. Hit that, and you'll be able to change the subject line.

About the misfire, is it constant or only when cold? Like Cheryl, I've encountered carboned valves on GDI GM's before, and a good upper end cleaning service solved it. There's different ways to check for this (FirstLook sensor for one), but sometimes it's just easier to do the service and see if the symptom improved. :lol:

If you're thinking injectors, then you could try adding fuel to the intake during the misfire and see if it goes away. If it does, then you can stay on the fuel delivery track. If not, go in another direction.

Ok thanks Tyler I will do that