98deville Posted March 1, 2009 Report Share Posted March 1, 2009 My car (98 deville) has lack of power and also stumbles on acceleration, even when I'm just stopped at a red light. I also keep getting a P0300 - Engine Misfire Detected code....How do I know whats misfiring and how can I fix it? I changed the plugs and wires sometime last year with oem ac delco brand. Link to comment Share on other sites More sharing options...
Ranger Posted March 1, 2009 Report Share Posted March 1, 2009 Next thing I'd check is the coils. Link to comment Share on other sites More sharing options...
98deville Posted March 8, 2009 Author Report Share Posted March 8, 2009 how do i check the coils Link to comment Share on other sites More sharing options...
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