I have a friend whose LB7 is doing some strange things, I'll try and explain this as best I can.
This is an 02 lb7 with 208K on it. The injectors have been replaced twice, most recent was 45K ago. The truck knocks so bad right now @ idle that it sounds like there's a monkey inside the engine with hammers, it also pours black smoke out of it so bad it will blind you. I ran the scan tool on it to check balance rates and here is where it get's interesting. All of the injectors read 0.00 until the idle jumps up every now and then by 100rpm's, then 3 of the inj go to 11.5 for a split second then back to 0. There is one that will go to 10.2 then back to 0. I have never seen balance rates look like this before. They will only jump up to these #'s for a split second and the only way to see what they went to is my looking at the max value. 3 of the inj never read anything other than 0.
Does anyone have an idea of what's going on? It sounds electrical to me, like maybe wires rubbed through somewhere. No codes either
This is an 02 lb7 with 208K on it. The injectors have been replaced twice, most recent was 45K ago. The truck knocks so bad right now @ idle that it sounds like there's a monkey inside the engine with hammers, it also pours black smoke out of it so bad it will blind you. I ran the scan tool on it to check balance rates and here is where it get's interesting. All of the injectors read 0.00 until the idle jumps up every now and then by 100rpm's, then 3 of the inj go to 11.5 for a split second then back to 0. There is one that will go to 10.2 then back to 0. I have never seen balance rates look like this before. They will only jump up to these #'s for a split second and the only way to see what they went to is my looking at the max value. 3 of the inj never read anything other than 0.
Does anyone have an idea of what's going on? It sounds electrical to me, like maybe wires rubbed through somewhere. No codes either
