Any help that anyone can give me would be great. Should I take it off of the car or not? Any real dangers that I should avoid? Any photos? Thanks!!

 

I think its easier to do a thorough job if you take it off the car, which is pretty easy.

I use a rag soaked in aerosol throttle body or carb/choke cleaner.

Its easy

Cheers
DD

PS-sometimes the management system has to "re-learn" a new idle. Might take a few minutes or, as in the case of my XJR, a couple days.