Cadillac Repair: Cadillac idles rough and hestitates under acceleration, cadillac eldorado, air shocks

Question
I have a 1994 Cadillac Eldorado touring coupe that ides rough and when under acceleration it tends to hesitate. I took it in and the shop said that 2 of the coils were not sparking so I had that pack replaced and put a new set of wires on it. It is still doing the same thing just not as bad as before. Do you suppose that I need to replace the remaining coil packs? What kind of tester can I buy to test the spark at the coils? Also, could you tell me how to install the coil packs and how to test for spark?

Question 2:
the service ride control indicator on the dash keeps coming on and I was told that the shocks may just need more air. Is it equiped with air shocks and if so how do I put more air in them?

Question 3:
One of the rear speakers is blown. How do I go about removing the speaker and replacing it with another 6x9? I assume that I need to take out the back dash cover but that seems to be a pretty extensive job.

Thanks so much for you help!
Josh

Answer
Could be:

coil packs.
ignition module.
crank sensor.


Ride control could be any number of items.


Rear speaker = Push the front portion of the lower portion of the rear seat to disengae the lock clips (2) and remove the rear seat. The rear seat back rest has a single bolt accessable from the trunk to release the rear back rest.

Pull upward on the rear stop lamp panel to release the snap clips.

Remove the screws from the back shelf panel to access the speaker.