Idling rough only in park

Thank you very much what would be the ways of checking for a vacuum leak or valve seals is there any singns or any test / trouble shooting methods that I would be able to use and also what type of injector cleaner .... Machine system shop injector cleaning or purchased from auto store por in my self thank you again for sharing your knowledge

Thank you every one I am trying title purple injector cleaner I will let you know how it turns out bless you all for taking time to help

Royal sry purple

Thank you I did use royle purple and changed my gas it seems to make a huge difference thank you guys so much for your time and knowledge... I have 3 pictures I am hoping you would be able to help me again I can see oil residue on all three I don't have a major problem but I just like to keep the car with great up keep

#2

#3

Can you please list the name of those components 1-3 please and your welcome and thank you again

Yes #2 is the cooler but I've been trying to find out the names of 1 and 3 I may have to show the pictures to the dealer to know the name of seals

Here are a little better pictuers I have one on each side

Left side

The big metal parts one on each side

So would there be a cam seal in-between the covers both sides have residue at bottom I'm guessing take sensors off unscrew the cover and replace seals would that be correct