6.0 Rough Starting and Contribution Coded

mmcalea

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Hey all.
The past couple weeks I've noticed my 05 6.0 isn't starting the best in the mornings. After sitting all night, when I go to start it in the morning in 50-60 degree weather, it starts rough and runs rough for the first 10-15 minutes I let it warm up. When I turn my key and wait for the plugs to warm up, the injectors click slow and weak sounding compared to how they used to be strong sounding and fast before I cranked it. The first mile or so you can notice a major power loss but it smooths out fine once it gets to 160 or so. I pulled the codes earlier with my sct and found 4 codes. They were P0261- cylinder 1 injector circuit low, P0263- cylinder 1 contribution balance, P0270- cylinder 4 injector circuit low, P0272- cylinder 4 contribution balance. I cleared the codes and drove a mile or so and checked again and everything was gone after it was at normal temp. Next day, it started rough like it has been and threw same codes again when it was cold. Sounds to me like I might have a couple injectors sticking, but wanted to get some more opinions before I pull them and get them rebuilt. I had my ficm checked a couple months ago when I had my truck reflashed and voltage was fine. Would a ficm cause codes like these or more than likely injectors dying out?? I changed the fuel filters and drained my water separator last oil change about 1500mile ago as well. Any help would be awesome!! Thanks!


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Mdub707

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Check battery voltage first. Have each battery individually load tested. Then check your FICM like suggested. Usually weak buzzing injectors is a FICM on it's way out or low voltage.
 

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