: 00 deville cylinder #4

08-05-07, 12:23 PM
im told by a scan tool that my cylinder #4 is misfiring... what cylinder is that?

08-05-07, 01:36 PM
also, i was checking all plugs and one was black so i replaced it. could a bad coil over plug pack be bad?

08-05-07, 03:16 PM
Left bank (2 4 6 8) Right bank (1 3 5 7)
Numbered from front to rear

Black plug usually indicates a rich condition. Stuck open injector perhaps.

08-05-07, 05:15 PM
well i got it fixed... swapped out my front coil with my brothers and it runs perfect. thanks for the help!

08-24-07, 07:19 PM
Were You Able To Test The Bad Coil And Find An Open Or Short? Just Curious If The Fault Was Detectable Without The Luxury Of Being Able To Try Another One