what now
 

:confused: well last week my car was running really bad missing stuttering,bucking and seemed to be getting worse,i bought new opti installed it 2 days ago seemed fine then driving home from work i could kinda feel it starting to miss slightly kinda get worse,what do you guys think,also got new stereo put in and when volume is low you can hear buzzing through speakers is that a bad plug? thank you so very much.

Just from My experiance with the opti, I would say first check your wires make sure they were put back on correctly and that none were damaged and are arching. then just start the process of elination over again coil, ICM, plugs ect.
Brad

Re: what now
 

If I'm not mistaken, alternator noise like that is usually a bad ground. Only takes a few minutes to check them. I would suppose some bad plug wires could emit interference that might be picked up.

When was the last time you changed your plug wires? Sounds like they could be due for a change. Does the problem seem worse in wet weather? That is usually a tell tale sign.

thanks brad hey i just read your post i to finally got rid of the 3 speaker bose crap,i put some infinity 6 3/4 in front and rear with deep well box with some mtx 10,s and a nice big alpine amp with alpine head unit see ya

stereo noise
 

Usually when you get noise in the speakers like the engine winding its because your power wire to your amp and the input (the rca cables) are to close together. They need to be ran on the opposite side of the car from one another.