What are causes of rough idle with these engines? my engine has always had a rough idle I think it might be a bad engine mount but I am not sure
At red lights I can feel a vibration in the streeling wheel

 

Might be worth watching OBD to see if any values are wiggling around that ought not to be.

 

Might be a some vacuum leak some where on the intake platum.

 

let me rephrase it's not rough idle it's vibrations mostly felt though the steering wheel at stop lights when I go into N or P the vibration in the streeling wheel is gone but can still feel slight engine shake while it idles back into drive and the steering wheel vibration returns

 

Start with new engine air filters same brand clean the maf sensor, throttle body, run a can of injector cleaner and report back

 

Second this. Good idea to start with the basic maintenance items.

My car had a little shake at idle when I got it, but after cleaning the throttle body, MAFs, and running a can of BG 44K, it runs silky smooth.

 

Is it recommended to do an oil change after running fuel system cleaners such as BG 44K
Also I never understood throttle body cleaning can the little bit of sludge build up effect anything? or is it the placebo effect?

 

Dpending type and functions of throtle body. Some have solenoid controlled idle channel or inbuild airflow sensor. These can be very sensitive for dirt. Also the throtle valve/flap itself can stuck or have limited movement with dirt.
These can be combined as well: Idle valve stuck open + Main flap donīt close + airflow sensor is dirty and donīt have correct measurement = Engine running lean and ECU think all is good. Add faulty or very old Lambda sensor on it and we have a perfect mess where no faulty codes but engine hardy even run.