6 months still cant find the problem!!! help please

[Focus On This 1]

Hi couple weeks after I baught my 320 the engine started shaking , so I changed :

-Maf
-Mounts
-Spark Plugs
-Fuel Filter
-Cleaned the injectors
-Cleaned throttle

But after all that money it still shaked all the time when Im at a red light and I can feel a big loss in performance.

What I noticed is when I put the injector cleaner in the tank the shaking gets less intense.
So I went to my mechanic and did the real injection cleaning and it worked no more shaking but instead of the shaking I had I hugeeee lag when I pressed the throttle , as soon as the lag whent away (after couple miles) the shaking started AGAIN!!!

When I changed the sparkplugs we noticed one of the coils was inflated but I didint change it because a faulty coil would trigger the Check Engine Light.(Right?)

So please help!!!!!:run:

 

[-Mike-]

Pas nécessairement, mon crown faisait des miss fires comme c'est pas possible et le check allumait pas. Finalement y'avais un coil de vêler.