I already cleaned my TB. Would it be a good idea to change my coil?? It doesnt shake like its just one cylinder. I thought maybe my coil isnt producing a strong enough spark. I just changed my opti about 4 months ago.

 

My car idles at about 1000 in park and is an a4..

 

I idle between 925 and 1050 on my 396 stroker and even at that rate, it doesn't idle smoothly.