I have a 93 LeSabre. It idles rough but once you rev it up to 1500rpm's its fine. Also there Is a vibration once you go into overdrive and it doesnt do it in any gear. Whoever has info or has experience on this would be nice. thankyou in advance.

 

Tested the Coil Packs. all three of them are at about 6 ohms. are they bad?