crispin Posted May 8, 2019 Report Share Posted May 8, 2019 I am working on a 2007 Edge with 130k miles on it. Throws code P0304 Cyl #4 has a new plug and coil (previous mechanic) I swapped the plug and coil with cyl #5 and still have the same code (after clearing it comes back) I have read about the PCM failures and need to have it rebuilt along with all new (OEM) goils and plugs. however this car does not flash the check engine light and I find it off that the misfire continues on this cyl even after swapping out coil and plug with another good working cyl Is it possible that I have an injector issue here? Or is it more likely that the PCM is damaged? This is a car that was bought from a auction and is needing to be repaired for as low cost as possible (low profit on this purchase) Thoughts? How should I proceed? Thank you very much for your help! Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted May 8, 2019 Report Share Posted May 8, 2019 Very possible it has an injector issue. You can compare electrical properties vs #5 & 6 injectors to confirm. Lucky it was not on #1-3 otherwise would have to pull the intake which you will have to if it is indeed faulty. But if not, you are spared a headache. At this mileage though doing all plugs at the least is a must, if that old plug looked worn. This is assuming you have cleared codes and the code has returned. Quote Link to comment Share on other sites More sharing options...
crispin Posted May 8, 2019 Author Report Share Posted May 8, 2019 Can you tell me how to compare the 2 injectors? I have cleared the codes and they returned. Quote Link to comment Share on other sites More sharing options...
crispin Posted May 8, 2019 Author Report Share Posted May 8, 2019 Just listened with a mechanics scope and injector #4 sounds very light and does not make a good click like injectors 5&6 do. So that would be an injector issue. Am I correct in thinking this? So I need 1 injector, 1 intake gasket kit, would be good to throw on 6 new plus while I have it apart even tho this is just a flip car, for the extra $50 I think it is the right thing to do. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted May 8, 2019 Report Share Posted May 8, 2019 yes at least that injector + 6 new plugs Quote Link to comment Share on other sites More sharing options...
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