I need some help on this one! 2004 LM7 with a dead miss. Has the new injectors. No codes. Balance rates are all in normal range and injector balance test shows all cylinders to be firing! Yet, still has a miss! I know, sounds weird or impossible but its happening anyway. Any help?

How are you measuring balance rates? In gear or out makes a difference. Do a search for balance rates. It was discussed before, but I don't remember where. In Park, balance rates were fine, in drive, way out.


Dennis

According to GM, the problem could be the dual mass flywheel. I neglected to mention that it is a manual trans, 4WD. We'll see soon.