rought idle, please help, pics attached

[wbhyperlite128]

Have a 2017 chevy colarado V6 with 100k miles on it. A year ago i replaced the spark plugs and valve cover gaskets. 3 months ago i cleaned MAF sensor, throttle body and changed air filter. Car seems to have a rocky idle issue that comes and goes, that is worse when RPM go the lowest without AC on.I have been trying to figure what is going on and ran some scans for short and long-term fuel trims, oxygen sensors, and throttle body positions. I have noticed that my engine is running lean specially in bank 2 with a  14% fuel trim and only 7% fuel trim in bank 1. Also when at idle my throttle body has a absolute throttle position @ 14% which seems to have a much lower commanded value of 6% which it seems it is not closing enough at idle. however, at higher RPM, the commanded throttle actuator position and absolute throttle position seem to match better.  Is there a vacuum leak keeping the throttle body open, or is the throttle body no good.PLEASE HELP!!!

 

 

 

[newdude]

On 11/1/2024 at 10:13 AM, wbhyperlite128 said:

Have a 2017 chevy colarado V6 with 100k miles on it. A year ago i replaced the spark plugs and valve cover gaskets. 3 months ago i cleaned MAF sensor, throttle body and changed air filter. Car seems to have a rocky idle issue that comes and goes, that is worse when RPM go the lowest without AC on.I have been trying to figure what is going on and ran some scans for short and long-term fuel trims, oxygen sensors, and throttle body positions. I have noticed that my engine is running lean specially in bank 2 with a  14% fuel trim and only 7% fuel trim in bank 1. Also when at idle my throttle body has a absolute throttle position @ 14% which seems to have a much lower commanded value of 6% which it seems it is not closing enough at idle. however, at higher RPM, the commanded throttle actuator position and absolute throttle position seem to match better.  Is there a vacuum leak keeping the throttle body open, or is the throttle body no good.PLEASE HELP!!!

 

 

 

 

 

 

Was it acting up before the plugs or after?

 

If after, did you replace the intake gasket when you did the plugs?