The car runs perfect after I changed all 6 coil packs and spark plugs 2 weeks ago. And then all of a sudden Im getting a missfire in one of the cyclinders what would cause this im suspecting that the fuel pump is going out. Im working on a 2005 sts cadillac 3.6 lit. Thanks Terry.
Friday, November 2nd, 2012 AT 6:20 AM