Join Date: Feb 2010
Location: Apache Oklahoma
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Inj Buzz test P1277
My 02 7.3 is running rough and missing with the engin light on. ran the injector buzz test and it came up with P1277. I checked the harness connection on the outside of the valve cover and it looked fine but could it still be burnt up on the inside or is the #7 injector bad. Sometimes when running down the road the light goes off and runs fine untill i put my foot into it. any help would be appreciated.
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