canucklehead Posted May 5 Report Share Posted May 5 my 2011 Edge has code P0304 cylinder 4 misfire again. Previously i tried swapping coil packs and plugs, clearing code and seeing if misfire code moved to the swapped out cylinder. it stayed the same so I assumed it was an injector issue. I dumped in 2 cans of Seafoam and the obvious miss at idle improved and the code went away. It was still running a bit lumpy & rough at idle but was a lot better. I concluded Seafoam cleaned injector. But now code has returned and it is idling rough. I am thinking of replacing the injectors. Since fuel rail gets pulled out to do this I figured I might as well replace all 6. Q: Does brand of injectors matter? Seems like Bosch would be OK. Quote Link to comment Share on other sites More sharing options...
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