Slight rough idle while running in park/neutral

I have 2010 double cab, 6 cyl auto with 42k miles. I have noticed a slight rough idle when the truck is running in park or neutral. Seems to run fine all other times. I just changed the plugs (they were originally) thinking this may help but it had no effect. I would describe the "roughness" as just enough to notice while in your seat or grabbing the steering wheel.

Any info would be appreciated on what it may be or a suggested fix.

 

I have a 2013 with 9k miles and it does the same, only in park though.

 

Thanks. I have only had mine about a month and it has done it since i got it. Maybe it's just one of the things these trucks do. I am a long time GM truck guy (and still have a 2500 Duramax) so I am still learning about the Tacomas.

 

May need to pull your throttle body and clean the build up around the throttle plate and the body itself.

 

Any other thoughts/ideas?

 

Clean the throttle body. Mine was a little rough when I bought it, used. I changed the plugs and cleaned the TB and it went back to a smooth idle.

 

Thanks. What mileage was on it when u cleaned the TB?

 

Check your air filter, also.

 

air filter is clean/new