I changed my spark plugs and cleaned my throttle body. Now it’s sounding odd and I can’t figure out what wrongs with it. There’s no check engine light. Any ideas of what it could be or what to check?

 

Did you remember to connect the sensors back to the throttle bodies? Do the Idle re-learn procedure?

 

Define "sounding odd"? How's it idling? A little more description of the problem will help us help you.

Here are the relearn procedures you HAVE to complete after a throttle body/MAF cleaning:


Here is a much easier way to complete the final Idle Air Volume Relearn :

 

yes I connected all the sensors and did the re-learn a few times and it’s still the same.
here’s the link with a video

https://www.reddit.com/r/G37/comment...tm_name=iossmf

 

What plugs did you use and did you gap/check them yourself?

You also have a disconnected breather hose on the passenger side that goes to the intake tubing. I see you capped the PCV intake ports on the manifold and are venting the PCV valves to atmosphere.

Sounds like a misfire.

 

I used Denso 3457 and yes I did check and gapped them and the pcv hoses are disconnected still deciding on either oil catch can or pcv delete kit

 

Interesting, I'd swap back to your old plugs to rule the new Denso's out.

 

will do I’ll update when done

 

@2.2Lude might be on to something with the spark plugs. Been a few instances of anything but NGKs causing drivability issues.

 

took a bit longer but inconveniently one of the coils went out. it was kind of weird that it didn't thro a code but figured it out.