This is a picture of my 400E distributor dust cover. I wanted to take it out to have a look at the back side of it because I know that they can become degraded and cause issues. My car is relatively new to me and wasn't running properly when I bought it. Because of the area where i purchased it, I had to take it to a regular mechanic shop to diagnose the issue. They ended up replacing both distributor caps and rotors and they also "sealed the dust caps with silicone" because they found a bunch of condensation inside the distributors. After I got the car back, it ran great for about 500 miles but now it's not running right again; sort of the same problem as before, the car cuts out and or misfires during normal driving although it starts fine now after driving for a while where it didn't before. My though was too pull out the dust caps to have a look at them and possibly replace them but when I tried to pull out the first one, it's stuck. I don't see any silicone anywhere but I'm thinking they maybe coated the back of the dust cover and now it's stuck there where it resides. I don't see anything else holding the dust cover where it's at right now unless I'm missing something? Shouldn't it pull right out after taking off the rotor? If it is being held there by silicone on the back side, could this be causing my running issues? Any suggestions? Also, pretty sure I still have the eco junk wiring harnesses which I plan to replace soon too so that's a whole other story....