I'm posting this for a friend who is on vacation,like the title says he had a sudden change in in performance.He hauled a 30 ft trailer ,winnipeg to quebec city no problem then the change.He said it also happened at easter this year but went away after dinner.I asked my buddy for codes ,as follows p2146,p2509,p0069,and po237.He just phoned me to say he cleared codes with his edge and only p2146 came back(bank 1 cyl 1-3 shorted high or low).Any idea where to look .Hoping for an easy fix ,sorry for the long post,Thanks Wayne

 

Usually injector or injector harness which is valve cover gastket. Check resistance of wiring to injector and injector resistance. There should be no resistance on wire and less then 1 ohm but greater then 0 ohms on injector. Could be either but I would go more toward valve cover gastket. I change several of them per week. New gastket have been changed and I haven't seen that problem anymore. Only tools needed are 10mm and 8mm socket and rachet, small screw driver to remove connector. DVOM helpful also.