chrisoreeves Posted February 8, 2020 Report Share Posted February 8, 2020 (edited) I have a 2011 SEL with the 3.5. It needed ignition coils because it would start misfiring at hard acceleration. So I replaced them all. Now its running really rough, misfiring at idle and dying, terrible acceleration and a popping or sputtering noise when accelerating at highway speeds. When it first did it, I got codes: p0420 p0430 p0300 p0306 p0302 I checked it again this morning and I am only getting the p0300, p0302 and p0306 codes. Does anyone have any suggestions? It has 225,000 (highway) miles on it so I am sure things will start to go bad on it. The coils I used were high quality, but not oem. Also, my brakes are bad and need to be bled. I'm only mentioning this because I saw a similar thread here and they asked about brakes. Thanks in advance for any help. Edited February 8, 2020 by chrisoreeves Quote Link to comment Share on other sites More sharing options...
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